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Finding the Fourth Proportional to 15,000.69, 20,702.19 and 8,629.35

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Solution

The fourth proportional to 15,000.69, 20,702.19 and 8,629.35 is: 11,909.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,000.69 : 20,702.19 = 8,629.35 : x
  2. Step 2: Convert to fraction form
    15,000.69/20,702.19 = 8,629.35/x
  3. Step 3: Cross multiply
    15,000.69x = 20,702.19 × 8,629.35
  4. Step 4: Simplify right side
    15,000.69x = 178,646,443.28
  5. Step 5: Solve for x
    x = 178,646,443.28/15,000.69
  6. Step 6: Final answer
    x = 11,909.22

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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.