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Finding the Fourth Proportional to 8,959.18, 12,363.68 and 4,980.20

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Solution

The fourth proportional to 8,959.18, 12,363.68 and 4,980.20 is: 6,872.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,959.18 : 12,363.68 = 4,980.20 : x
  2. Step 2: Convert to fraction form
    8,959.18/12,363.68 = 4,980.20/x
  3. Step 3: Cross multiply
    8,959.18x = 12,363.68 × 4,980.20
  4. Step 4: Simplify right side
    8,959.18x = 61,573,599.14
  5. Step 5: Solve for x
    x = 61,573,599.14/8,959.18
  6. Step 6: Final answer
    x = 6,872.68

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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.