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Finding the Fourth Proportional to 8,987.80, 12,403.38 and 5,009.08

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Solution

The fourth proportional to 8,987.80, 12,403.38 and 5,009.08 is: 6,912.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,987.80 : 12,403.38 = 5,009.08 : x
  2. Step 2: Convert to fraction form
    8,987.80/12,403.38 = 5,009.08/x
  3. Step 3: Cross multiply
    8,987.80x = 12,403.38 × 5,009.08
  4. Step 4: Simplify right side
    8,987.80x = 62,129,522.69
  5. Step 5: Solve for x
    x = 62,129,522.69/8,987.80
  6. Step 6: Final answer
    x = 6,912.65

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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.