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Finding the Fourth Proportional to 28,059.60, 38,721.48 and 15,483.44

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Solution

The fourth proportional to 28,059.60, 38,721.48 and 15,483.44 is: 21,366.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,059.60 : 38,721.48 = 15,483.44 : x
  2. Step 2: Convert to fraction form
    28,059.60/38,721.48 = 15,483.44/x
  3. Step 3: Cross multiply
    28,059.60x = 38,721.48 × 15,483.44
  4. Step 4: Simplify right side
    28,059.60x = 599,541,712.29
  5. Step 5: Solve for x
    x = 599,541,712.29/28,059.60
  6. Step 6: Final answer
    x = 21,366.72

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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.