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Finding the Fourth Proportional to 15,148.50, 20,901.52 and 9,179.96

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Solution

The fourth proportional to 15,148.50, 20,901.52 and 9,179.96 is: 12,666.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,148.50 : 20,901.52 = 9,179.96 : x
  2. Step 2: Convert to fraction form
    15,148.50/20,901.52 = 9,179.96/x
  3. Step 3: Cross multiply
    15,148.50x = 20,901.52 × 9,179.96
  4. Step 4: Simplify right side
    15,148.50x = 191,875,117.54
  5. Step 5: Solve for x
    x = 191,875,117.54/15,148.50
  6. Step 6: Final answer
    x = 12,666.28

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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.