Home / 23,130.55-31,920.10-12,520.18

Finding the Fourth Proportional to 23,130.55, 31,920.10 and 12,520.18

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Solution

The fourth proportional to 23,130.55, 31,920.10 and 12,520.18 is: 17,277.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    23,130.55 : 31,920.10 = 12,520.18 : x
  2. Step 2: Convert to fraction form
    23,130.55/31,920.10 = 12,520.18/x
  3. Step 3: Cross multiply
    23,130.55x = 31,920.10 × 12,520.18
  4. Step 4: Simplify right side
    23,130.55x = 399,645,397.62
  5. Step 5: Solve for x
    x = 399,645,397.62/23,130.55
  6. Step 6: Final answer
    x = 17,277.82

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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.