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Finding the Fourth Proportional to 15,124.68, 20,870.08 and 8,408.97

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Solution

The fourth proportional to 15,124.68, 20,870.08 and 8,408.97 is: 11,603.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,124.68 : 20,870.08 = 8,408.97 : x
  2. Step 2: Convert to fraction form
    15,124.68/20,870.08 = 8,408.97/x
  3. Step 3: Cross multiply
    15,124.68x = 20,870.08 × 8,408.97
  4. Step 4: Simplify right side
    15,124.68x = 175,495,876.62
  5. Step 5: Solve for x
    x = 175,495,876.62/15,124.68
  6. Step 6: Final answer
    x = 11,603.28

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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.