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Finding the Fourth Proportional to 28,079.92, 38,749.52 and 15,504.40

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Solution

The fourth proportional to 28,079.92, 38,749.52 and 15,504.40 is: 21,395.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,079.92 : 38,749.52 = 15,504.40 : x
  2. Step 2: Convert to fraction form
    28,079.92/38,749.52 = 15,504.40/x
  3. Step 3: Cross multiply
    28,079.92x = 38,749.52 × 15,504.40
  4. Step 4: Simplify right side
    28,079.92x = 600,788,057.89
  5. Step 5: Solve for x
    x = 600,788,057.89/28,079.92
  6. Step 6: Final answer
    x = 21,395.65

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.