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Finding the Fourth Proportional to 28,497.88, 42,746.82 and 7,720.84

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Solution

The fourth proportional to 28,497.88, 42,746.82 and 7,720.84 is: 11,581.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,497.88 : 42,746.82 = 7,720.84 : x
  2. Step 2: Convert to fraction form
    28,497.88/42,746.82 = 7,720.84/x
  3. Step 3: Cross multiply
    28,497.88x = 42,746.82 × 7,720.84
  4. Step 4: Simplify right side
    28,497.88x = 330,041,357.73
  5. Step 5: Solve for x
    x = 330,041,357.73/28,497.88
  6. Step 6: Final answer
    x = 11,581.26

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Similar ratio
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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.