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Finding the Fourth Proportional to 8,869.72, 13,312.76 and 4,490.28

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Solution

The fourth proportional to 8,869.72, 13,312.76 and 4,490.28 is: 6,739.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,869.72 : 13,312.76 = 4,490.28 : x
  2. Step 2: Convert to fraction form
    8,869.72/13,312.76 = 4,490.28/x
  3. Step 3: Cross multiply
    8,869.72x = 13,312.76 × 4,490.28
  4. Step 4: Simplify right side
    8,869.72x = 59,778,019.97
  5. Step 5: Solve for x
    x = 59,778,019.97/8,869.72
  6. Step 6: Final answer
    x = 6,739.56

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.