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Finding the Fourth Proportional to 9,983.60, 14,959.20 and 6,279.20

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Solution

The fourth proportional to 9,983.60, 14,959.20 and 6,279.20 is: 9,408.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,983.60 : 14,959.20 = 6,279.20 : x
  2. Step 2: Convert to fraction form
    9,983.60/14,959.20 = 6,279.20/x
  3. Step 3: Cross multiply
    9,983.60x = 14,959.20 × 6,279.20
  4. Step 4: Simplify right side
    9,983.60x = 93,931,808.64
  5. Step 5: Solve for x
    x = 93,931,808.64/9,983.60
  6. Step 6: Final answer
    x = 9,408.61

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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.