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Finding the Fourth Proportional to 8,762.40, 13,132.72 and 7,712.64

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Solution

The fourth proportional to 8,762.40, 13,132.72 and 7,712.64 is: 11,559.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,762.40 : 13,132.72 = 7,712.64 : x
  2. Step 2: Convert to fraction form
    8,762.40/13,132.72 = 7,712.64/x
  3. Step 3: Cross multiply
    8,762.40x = 13,132.72 × 7,712.64
  4. Step 4: Simplify right side
    8,762.40x = 101,287,941.58
  5. Step 5: Solve for x
    x = 101,287,941.58/8,762.40
  6. Step 6: Final answer
    x = 11,559.38

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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.