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Finding the Fourth Proportional to 28,868.49, 43,303.95 and 9,146.61

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Solution

The fourth proportional to 28,868.49, 43,303.95 and 9,146.61 is: 13,720.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,868.49 : 43,303.95 = 9,146.61 : x
  2. Step 2: Convert to fraction form
    28,868.49/43,303.95 = 9,146.61/x
  3. Step 3: Cross multiply
    28,868.49x = 43,303.95 × 9,146.61
  4. Step 4: Simplify right side
    28,868.49x = 396,084,079.86
  5. Step 5: Solve for x
    x = 396,084,079.86/28,868.49
  6. Step 6: Final answer
    x = 13,720.29

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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.