Home / 28,428.57-39,216.56-21,702.53

Finding the Fourth Proportional to 28,428.57, 39,216.56 and 21,702.53

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Solution

The fourth proportional to 28,428.57, 39,216.56 and 21,702.53 is: 29,938.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,428.57 : 39,216.56 = 21,702.53 : x
  2. Step 2: Convert to fraction form
    28,428.57/39,216.56 = 21,702.53/x
  3. Step 3: Cross multiply
    28,428.57x = 39,216.56 × 21,702.53
  4. Step 4: Simplify right side
    28,428.57x = 851,098,559.43
  5. Step 5: Solve for x
    x = 851,098,559.43/28,428.57
  6. Step 6: Final answer
    x = 29,938.14

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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.