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Finding the Fourth Proportional to 8,765.55, 13,071.12 and 8,686.58

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Solution

The fourth proportional to 8,765.55, 13,071.12 and 8,686.58 is: 12,953.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,765.55 : 13,071.12 = 8,686.58 : x
  2. Step 2: Convert to fraction form
    8,765.55/13,071.12 = 8,686.58/x
  3. Step 3: Cross multiply
    8,765.55x = 13,071.12 × 8,686.58
  4. Step 4: Simplify right side
    8,765.55x = 113,543,264.21
  5. Step 5: Solve for x
    x = 113,543,264.21/8,765.55
  6. Step 6: Final answer
    x = 12,953.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.