Home / 30,510.77-42,124.44-20,947.58

Finding the Fourth Proportional to 30,510.77, 42,124.44 and 20,947.58

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Solution

The fourth proportional to 30,510.77, 42,124.44 and 20,947.58 is: 28,921.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,510.77 : 42,124.44 = 20,947.58 : x
  2. Step 2: Convert to fraction form
    30,510.77/42,124.44 = 20,947.58/x
  3. Step 3: Cross multiply
    30,510.77x = 42,124.44 × 20,947.58
  4. Step 4: Simplify right side
    30,510.77x = 882,404,866.23
  5. Step 5: Solve for x
    x = 882,404,866.23/30,510.77
  6. Step 6: Final answer
    x = 28,921.10

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Half scale
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Double scale
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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.