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Finding the Fourth Proportional to 8,987.99, 12,403.39 and 5,009.15

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Solution

The fourth proportional to 8,987.99, 12,403.39 and 5,009.15 is: 6,912.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,987.99 : 12,403.39 = 5,009.15 : x
  2. Step 2: Convert to fraction form
    8,987.99/12,403.39 = 5,009.15/x
  3. Step 3: Cross multiply
    8,987.99x = 12,403.39 × 5,009.15
  4. Step 4: Simplify right side
    8,987.99x = 62,130,441.02
  5. Step 5: Solve for x
    x = 62,130,441.02/8,987.99
  6. Step 6: Final answer
    x = 6,912.61

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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.