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Finding the Fourth Proportional to 8,988.76, 13,479.90 and 6,215.32

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Solution

The fourth proportional to 8,988.76, 13,479.90 and 6,215.32 is: 9,320.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,988.76 : 13,479.90 = 6,215.32 : x
  2. Step 2: Convert to fraction form
    8,988.76/13,479.90 = 6,215.32/x
  3. Step 3: Cross multiply
    8,988.76x = 13,479.90 × 6,215.32
  4. Step 4: Simplify right side
    8,988.76x = 83,781,892.07
  5. Step 5: Solve for x
    x = 83,781,892.07/8,988.76
  6. Step 6: Final answer
    x = 9,320.74

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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.