Home / 22,689.12-31,310.10-13,128.96

Finding the Fourth Proportional to 22,689.12, 31,310.10 and 13,128.96

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Solution

The fourth proportional to 22,689.12, 31,310.10 and 13,128.96 is: 18,117.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,689.12 : 31,310.10 = 13,128.96 : x
  2. Step 2: Convert to fraction form
    22,689.12/31,310.10 = 13,128.96/x
  3. Step 3: Cross multiply
    22,689.12x = 31,310.10 × 13,128.96
  4. Step 4: Simplify right side
    22,689.12x = 411,069,050.50
  5. Step 5: Solve for x
    x = 411,069,050.50/22,689.12
  6. Step 6: Final answer
    x = 18,117.45

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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.