Home / 15,294.93-21,108.09-8,489.31

Finding the Fourth Proportional to 15,294.93, 21,108.09 and 8,489.31

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Solution

The fourth proportional to 15,294.93, 21,108.09 and 8,489.31 is: 11,715.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,294.93 : 21,108.09 = 8,489.31 : x
  2. Step 2: Convert to fraction form
    15,294.93/21,108.09 = 8,489.31/x
  3. Step 3: Cross multiply
    15,294.93x = 21,108.09 × 8,489.31
  4. Step 4: Simplify right side
    15,294.93x = 179,193,072.20
  5. Step 5: Solve for x
    x = 179,193,072.20/15,294.93
  6. Step 6: Final answer
    x = 11,715.85

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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.