Home / 21,170.12-31,754.94-7,318.92

Finding the Fourth Proportional to 21,170.12, 31,754.94 and 7,318.92

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Solution

The fourth proportional to 21,170.12, 31,754.94 and 7,318.92 is: 10,978.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,170.12 : 31,754.94 = 7,318.92 : x
  2. Step 2: Convert to fraction form
    21,170.12/31,754.94 = 7,318.92/x
  3. Step 3: Cross multiply
    21,170.12x = 31,754.94 × 7,318.92
  4. Step 4: Simplify right side
    21,170.12x = 232,411,865.46
  5. Step 5: Solve for x
    x = 232,411,865.46/21,170.12
  6. Step 6: Final answer
    x = 10,978.30

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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.