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Finding the Fourth Proportional to 28,400.49, 42,619.70 and 9,932.49

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Solution

The fourth proportional to 28,400.49, 42,619.70 and 9,932.49 is: 14,905.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,400.49 : 42,619.70 = 9,932.49 : x
  2. Step 2: Convert to fraction form
    28,400.49/42,619.70 = 9,932.49/x
  3. Step 3: Cross multiply
    28,400.49x = 42,619.70 × 9,932.49
  4. Step 4: Simplify right side
    28,400.49x = 423,319,744.05
  5. Step 5: Solve for x
    x = 423,319,744.05/28,400.49
  6. Step 6: Final answer
    x = 14,905.37

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1.5x scale

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.