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Finding the Fourth Proportional to 8,860.15, 13,290.24 and 8,318.87

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Solution

The fourth proportional to 8,860.15, 13,290.24 and 8,318.87 is: 12,478.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,860.15 : 13,290.24 = 8,318.87 : x
  2. Step 2: Convert to fraction form
    8,860.15/13,290.24 = 8,318.87/x
  3. Step 3: Cross multiply
    8,860.15x = 13,290.24 × 8,318.87
  4. Step 4: Simplify right side
    8,860.15x = 110,559,681.18
  5. Step 5: Solve for x
    x = 110,559,681.18/8,860.15
  6. Step 6: Final answer
    x = 12,478.31

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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.