Home / 22,539.09-31,129.48-15,356.55

Finding the Fourth Proportional to 22,539.09, 31,129.48 and 15,356.55

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Solution

The fourth proportional to 22,539.09, 31,129.48 and 15,356.55 is: 21,209.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,539.09 : 31,129.48 = 15,356.55 : x
  2. Step 2: Convert to fraction form
    22,539.09/31,129.48 = 15,356.55/x
  3. Step 3: Cross multiply
    22,539.09x = 31,129.48 × 15,356.55
  4. Step 4: Simplify right side
    22,539.09x = 478,041,339.31
  5. Step 5: Solve for x
    x = 478,041,339.31/22,539.09
  6. Step 6: Final answer
    x = 21,209.43

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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.