Home / 15,487.40-21,372.26-8,681.18

Finding the Fourth Proportional to 15,487.40, 21,372.26 and 8,681.18

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Solution

The fourth proportional to 15,487.40, 21,372.26 and 8,681.18 is: 11,979.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,487.40 : 21,372.26 = 8,681.18 : x
  2. Step 2: Convert to fraction form
    15,487.40/21,372.26 = 8,681.18/x
  3. Step 3: Cross multiply
    15,487.40x = 21,372.26 × 8,681.18
  4. Step 4: Simplify right side
    15,487.40x = 185,536,285.80
  5. Step 5: Solve for x
    x = 185,536,285.80/15,487.40
  6. Step 6: Final answer
    x = 11,979.82

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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.