Home / 21,149.32-31,719.38-8,666.12

Finding the Fourth Proportional to 21,149.32, 31,719.38 and 8,666.12

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Solution

The fourth proportional to 21,149.32, 31,719.38 and 8,666.12 is: 12,997.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,149.32 : 31,719.38 = 8,666.12 : x
  2. Step 2: Convert to fraction form
    21,149.32/31,719.38 = 8,666.12/x
  3. Step 3: Cross multiply
    21,149.32x = 31,719.38 × 8,666.12
  4. Step 4: Simplify right side
    21,149.32x = 274,883,953.41
  5. Step 5: Solve for x
    x = 274,883,953.41/21,149.32
  6. Step 6: Final answer
    x = 12,997.30

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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.