Home / 22,690.35-31,316.80-13,129.11

Finding the Fourth Proportional to 22,690.35, 31,316.80 and 13,129.11

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Solution

The fourth proportional to 22,690.35, 31,316.80 and 13,129.11 is: 18,120.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,690.35 : 31,316.80 = 13,129.11 : x
  2. Step 2: Convert to fraction form
    22,690.35/31,316.80 = 13,129.11/x
  3. Step 3: Cross multiply
    22,690.35x = 31,316.80 × 13,129.11
  4. Step 4: Simplify right side
    22,690.35x = 411,161,712.05
  5. Step 5: Solve for x
    x = 411,161,712.05/22,690.35
  6. Step 6: Final answer
    x = 18,120.55

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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.