Home / 23,130.76-31,920.61-12,520.42

Finding the Fourth Proportional to 23,130.76, 31,920.61 and 12,520.42

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Solution

The fourth proportional to 23,130.76, 31,920.61 and 12,520.42 is: 17,278.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    23,130.76 : 31,920.61 = 12,520.42 : x
  2. Step 2: Convert to fraction form
    23,130.76/31,920.61 = 12,520.42/x
  3. Step 3: Cross multiply
    23,130.76x = 31,920.61 × 12,520.42
  4. Step 4: Simplify right side
    23,130.76x = 399,659,332.75
  5. Step 5: Solve for x
    x = 399,659,332.75/23,130.76
  6. Step 6: Final answer
    x = 17,278.26

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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.