Home / 21,192.12-31,798.50-8,715.87

Finding the Fourth Proportional to 21,192.12, 31,798.50 and 8,715.87

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Solution

The fourth proportional to 21,192.12, 31,798.50 and 8,715.87 is: 13,078.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,192.12 : 31,798.50 = 8,715.87 : x
  2. Step 2: Convert to fraction form
    21,192.12/31,798.50 = 8,715.87/x
  3. Step 3: Cross multiply
    21,192.12x = 31,798.50 × 8,715.87
  4. Step 4: Simplify right side
    21,192.12x = 277,151,592.20
  5. Step 5: Solve for x
    x = 277,151,592.20/21,192.12
  6. Step 6: Final answer
    x = 13,078.05

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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.