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Finding the Fourth Proportional to 6,866.60, 10,291.80 and 5,133.20

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Solution

The fourth proportional to 6,866.60, 10,291.80 and 5,133.20 is: 7,693.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,866.60 : 10,291.80 = 5,133.20 : x
  2. Step 2: Convert to fraction form
    6,866.60/10,291.80 = 5,133.20/x
  3. Step 3: Cross multiply
    6,866.60x = 10,291.80 × 5,133.20
  4. Step 4: Simplify right side
    6,866.60x = 52,829,867.76
  5. Step 5: Solve for x
    x = 52,829,867.76/6,866.60
  6. Step 6: Final answer
    x = 7,693.74

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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.