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Finding the Fourth Proportional to 28,059.68, 38,721.36 and 15,484.40

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Solution

The fourth proportional to 28,059.68, 38,721.36 and 15,484.40 is: 21,367.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,059.68 : 38,721.36 = 15,484.40 : x
  2. Step 2: Convert to fraction form
    28,059.68/38,721.36 = 15,484.40/x
  3. Step 3: Cross multiply
    28,059.68x = 38,721.36 × 15,484.40
  4. Step 4: Simplify right side
    28,059.68x = 599,577,026.78
  5. Step 5: Solve for x
    x = 599,577,026.78/28,059.68
  6. Step 6: Final answer
    x = 21,367.92

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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.