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Finding the Fourth Proportional to 8,860.86, 12,216.58 and 7,261.65

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Solution

The fourth proportional to 8,860.86, 12,216.58 and 7,261.65 is: 10,011.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,860.86 : 12,216.58 = 7,261.65 : x
  2. Step 2: Convert to fraction form
    8,860.86/12,216.58 = 7,261.65/x
  3. Step 3: Cross multiply
    8,860.86x = 12,216.58 × 7,261.65
  4. Step 4: Simplify right side
    8,860.86x = 88,712,528.16
  5. Step 5: Solve for x
    x = 88,712,528.16/8,860.86
  6. Step 6: Final answer
    x = 10,011.73

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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.