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Finding the Fourth Proportional to 28,932.20, 43,400.70 and 9,210.20

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Solution

The fourth proportional to 28,932.20, 43,400.70 and 9,210.20 is: 13,816.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,932.20 : 43,400.70 = 9,210.20 : x
  2. Step 2: Convert to fraction form
    28,932.20/43,400.70 = 9,210.20/x
  3. Step 3: Cross multiply
    28,932.20x = 43,400.70 × 9,210.20
  4. Step 4: Simplify right side
    28,932.20x = 399,729,127.14
  5. Step 5: Solve for x
    x = 399,729,127.14/28,932.20
  6. Step 6: Final answer
    x = 13,816.06

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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.