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Finding the Fourth Proportional to 8,988.06, 13,509.00 and 7,438.02

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Solution

The fourth proportional to 8,988.06, 13,509.00 and 7,438.02 is: 11,179.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,988.06 : 13,509.00 = 7,438.02 : x
  2. Step 2: Convert to fraction form
    8,988.06/13,509.00 = 7,438.02/x
  3. Step 3: Cross multiply
    8,988.06x = 13,509.00 × 7,438.02
  4. Step 4: Simplify right side
    8,988.06x = 100,480,201.86
  5. Step 5: Solve for x
    x = 100,480,201.86/8,988.06
  6. Step 6: Final answer
    x = 11,179.30

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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.