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Finding the Fourth Proportional to 28,663.68, 42,947.04 and 13,879.68

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Solution

The fourth proportional to 28,663.68, 42,947.04 and 13,879.68 is: 20,796.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,663.68 : 42,947.04 = 13,879.68 : x
  2. Step 2: Convert to fraction form
    28,663.68/42,947.04 = 13,879.68/x
  3. Step 3: Cross multiply
    28,663.68x = 42,947.04 × 13,879.68
  4. Step 4: Simplify right side
    28,663.68x = 596,091,172.15
  5. Step 5: Solve for x
    x = 596,091,172.15/28,663.68
  6. Step 6: Final answer
    x = 20,796.04

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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.