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Finding the Fourth Proportional to 8,561.76, 12,817.68 and 5,264.88

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Solution

The fourth proportional to 8,561.76, 12,817.68 and 5,264.88 is: 7,881.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,561.76 : 12,817.68 = 5,264.88 : x
  2. Step 2: Convert to fraction form
    8,561.76/12,817.68 = 5,264.88/x
  3. Step 3: Cross multiply
    8,561.76x = 12,817.68 × 5,264.88
  4. Step 4: Simplify right side
    8,561.76x = 67,483,547.08
  5. Step 5: Solve for x
    x = 67,483,547.08/8,561.76
  6. Step 6: Final answer
    x = 7,881.97

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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.