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Finding the Fourth Proportional to 8,459.68, 12,689.52 and 2,913.16

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Solution

The fourth proportional to 8,459.68, 12,689.52 and 2,913.16 is: 4,369.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,459.68 : 12,689.52 = 2,913.16 : x
  2. Step 2: Convert to fraction form
    8,459.68/12,689.52 = 2,913.16/x
  3. Step 3: Cross multiply
    8,459.68x = 12,689.52 × 2,913.16
  4. Step 4: Simplify right side
    8,459.68x = 36,966,602.08
  5. Step 5: Solve for x
    x = 36,966,602.08/8,459.68
  6. Step 6: Final answer
    x = 4,369.74

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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.