Home / 21,240.63-31,864.79-8,753.70

Finding the Fourth Proportional to 21,240.63, 31,864.79 and 8,753.70

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Solution

The fourth proportional to 21,240.63, 31,864.79 and 8,753.70 is: 13,132.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,240.63 : 31,864.79 = 8,753.70 : x
  2. Step 2: Convert to fraction form
    21,240.63/31,864.79 = 8,753.70/x
  3. Step 3: Cross multiply
    21,240.63x = 31,864.79 × 8,753.70
  4. Step 4: Simplify right side
    21,240.63x = 278,934,953.60
  5. Step 5: Solve for x
    x = 278,934,953.60/21,240.63
  6. Step 6: Final answer
    x = 13,132.14

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.