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Finding the Fourth Proportional to 10,979.90, 15,151.30 and 6,502.90

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Solution

The fourth proportional to 10,979.90, 15,151.30 and 6,502.90 is: 8,973.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,979.90 : 15,151.30 = 6,502.90 : x
  2. Step 2: Convert to fraction form
    10,979.90/15,151.30 = 6,502.90/x
  3. Step 3: Cross multiply
    10,979.90x = 15,151.30 × 6,502.90
  4. Step 4: Simplify right side
    10,979.90x = 98,527,388.77
  5. Step 5: Solve for x
    x = 98,527,388.77/10,979.90
  6. Step 6: Final answer
    x = 8,973.43

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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.