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Finding the Fourth Proportional to 8,772.34, 12,101.60 and 6,378.60

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Solution

The fourth proportional to 8,772.34, 12,101.60 and 6,378.60 is: 8,799.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,772.34 : 12,101.60 = 6,378.60 : x
  2. Step 2: Convert to fraction form
    8,772.34/12,101.60 = 6,378.60/x
  3. Step 3: Cross multiply
    8,772.34x = 12,101.60 × 6,378.60
  4. Step 4: Simplify right side
    8,772.34x = 77,191,281.71
  5. Step 5: Solve for x
    x = 77,191,281.71/8,772.34
  6. Step 6: Final answer
    x = 8,799.40

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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.