Home / 22,558.12-31,129.98-13,487.65

Finding the Fourth Proportional to 22,558.12, 31,129.98 and 13,487.65

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Solution

The fourth proportional to 22,558.12, 31,129.98 and 13,487.65 is: 18,612.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,558.12 : 31,129.98 = 13,487.65 : x
  2. Step 2: Convert to fraction form
    22,558.12/31,129.98 = 13,487.65/x
  3. Step 3: Cross multiply
    22,558.12x = 31,129.98 × 13,487.65
  4. Step 4: Simplify right side
    22,558.12x = 419,870,274.75
  5. Step 5: Solve for x
    x = 419,870,274.75/22,558.12
  6. Step 6: Final answer
    x = 18,612.82

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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.