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Finding the Fourth Proportional to 8,968.60, 12,376.50 and 4,989.64

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Solution

The fourth proportional to 8,968.60, 12,376.50 and 4,989.64 is: 6,885.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,968.60 : 12,376.50 = 4,989.64 : x
  2. Step 2: Convert to fraction form
    8,968.60/12,376.50 = 4,989.64/x
  3. Step 3: Cross multiply
    8,968.60x = 12,376.50 × 4,989.64
  4. Step 4: Simplify right side
    8,968.60x = 61,754,279.46
  5. Step 5: Solve for x
    x = 61,754,279.46/8,968.60
  6. Step 6: Final answer
    x = 6,885.61

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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.