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Finding the Fourth Proportional to 8,458.60, 11,672.70 and 5,270.30

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Solution

The fourth proportional to 8,458.60, 11,672.70 and 5,270.30 is: 7,272.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,458.60 : 11,672.70 = 5,270.30 : x
  2. Step 2: Convert to fraction form
    8,458.60/11,672.70 = 5,270.30/x
  3. Step 3: Cross multiply
    8,458.60x = 11,672.70 × 5,270.30
  4. Step 4: Simplify right side
    8,458.60x = 61,518,630.81
  5. Step 5: Solve for x
    x = 61,518,630.81/8,458.60
  6. Step 6: Final answer
    x = 7,272.91

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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.