Home / 15,402.12-21,254.87-8,687.70

Finding the Fourth Proportional to 15,402.12, 21,254.87 and 8,687.70

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Solution

The fourth proportional to 15,402.12, 21,254.87 and 8,687.70 is: 11,988.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,402.12 : 21,254.87 = 8,687.70 : x
  2. Step 2: Convert to fraction form
    15,402.12/21,254.87 = 8,687.70/x
  3. Step 3: Cross multiply
    15,402.12x = 21,254.87 × 8,687.70
  4. Step 4: Simplify right side
    15,402.12x = 184,655,890.66
  5. Step 5: Solve for x
    x = 184,655,890.66/15,402.12
  6. Step 6: Final answer
    x = 11,988.99

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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.