Home / 15,489.57-21,377.43-9,201.95

Finding the Fourth Proportional to 15,489.57, 21,377.43 and 9,201.95

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Solution

The fourth proportional to 15,489.57, 21,377.43 and 9,201.95 is: 12,699.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,489.57 : 21,377.43 = 9,201.95 : x
  2. Step 2: Convert to fraction form
    15,489.57/21,377.43 = 9,201.95/x
  3. Step 3: Cross multiply
    15,489.57x = 21,377.43 × 9,201.95
  4. Step 4: Simplify right side
    15,489.57x = 196,713,935.10
  5. Step 5: Solve for x
    x = 196,713,935.10/15,489.57
  6. Step 6: Final answer
    x = 12,699.77

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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.