Home / 30,838.17-42,534.72-21,281.70

Finding the Fourth Proportional to 30,838.17, 42,534.72 and 21,281.70

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Solution

The fourth proportional to 30,838.17, 42,534.72 and 21,281.70 is: 29,353.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,838.17 : 42,534.72 = 21,281.70 : x
  2. Step 2: Convert to fraction form
    30,838.17/42,534.72 = 21,281.70/x
  3. Step 3: Cross multiply
    30,838.17x = 42,534.72 × 21,281.70
  4. Step 4: Simplify right side
    30,838.17x = 905,211,150.62
  5. Step 5: Solve for x
    x = 905,211,150.62/30,838.17
  6. Step 6: Final answer
    x = 29,353.59

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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.