Home / 15,487.80-21,373.05-8,414.28

Finding the Fourth Proportional to 15,487.80, 21,373.05 and 8,414.28

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Solution

The fourth proportional to 15,487.80, 21,373.05 and 8,414.28 is: 11,611.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,487.80 : 21,373.05 = 8,414.28 : x
  2. Step 2: Convert to fraction form
    15,487.80/21,373.05 = 8,414.28/x
  3. Step 3: Cross multiply
    15,487.80x = 21,373.05 × 8,414.28
  4. Step 4: Simplify right side
    15,487.80x = 179,838,827.15
  5. Step 5: Solve for x
    x = 179,838,827.15/15,487.80
  6. Step 6: Final answer
    x = 11,611.64

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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.