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Finding the Fourth Proportional to 8,724.16, 12,026.64 and 6,624.64

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Solution

The fourth proportional to 8,724.16, 12,026.64 and 6,624.64 is: 9,132.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,724.16 : 12,026.64 = 6,624.64 : x
  2. Step 2: Convert to fraction form
    8,724.16/12,026.64 = 6,624.64/x
  3. Step 3: Cross multiply
    8,724.16x = 12,026.64 × 6,624.64
  4. Step 4: Simplify right side
    8,724.16x = 79,672,160.41
  5. Step 5: Solve for x
    x = 79,672,160.41/8,724.16
  6. Step 6: Final answer
    x = 9,132.36

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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.