Home / 22,613.20-31,231.76-15,430.81

Finding the Fourth Proportional to 22,613.20, 31,231.76 and 15,430.81

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Solution

The fourth proportional to 22,613.20, 31,231.76 and 15,430.81 is: 21,311.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,613.20 : 31,231.76 = 15,430.81 : x
  2. Step 2: Convert to fraction form
    22,613.20/31,231.76 = 15,430.81/x
  3. Step 3: Cross multiply
    22,613.20x = 31,231.76 × 15,430.81
  4. Step 4: Simplify right side
    22,613.20x = 481,931,354.53
  5. Step 5: Solve for x
    x = 481,931,354.53/22,613.20
  6. Step 6: Final answer
    x = 21,311.95

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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.