Home / 30,573.75-42,178.41-21,628.92

Finding the Fourth Proportional to 30,573.75, 42,178.41 and 21,628.92

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Solution

The fourth proportional to 30,573.75, 42,178.41 and 21,628.92 is: 29,838.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,573.75 : 42,178.41 = 21,628.92 : x
  2. Step 2: Convert to fraction form
    30,573.75/42,178.41 = 21,628.92/x
  3. Step 3: Cross multiply
    30,573.75x = 42,178.41 × 21,628.92
  4. Step 4: Simplify right side
    30,573.75x = 912,273,455.62
  5. Step 5: Solve for x
    x = 912,273,455.62/30,573.75
  6. Step 6: Final answer
    x = 29,838.45

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Half scale
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Double scale
Find fourth proportional to 30,574.75, 42,179.79 and 21,629.92
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.