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Finding the Fourth Proportional to 28,497.50, 42,746.24 and 7,721.00

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Solution

The fourth proportional to 28,497.50, 42,746.24 and 7,721.00 is: 11,581.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,497.50 : 42,746.24 = 7,721.00 : x
  2. Step 2: Convert to fraction form
    28,497.50/42,746.24 = 7,721.00/x
  3. Step 3: Cross multiply
    28,497.50x = 42,746.24 × 7,721.00
  4. Step 4: Simplify right side
    28,497.50x = 330,043,466.70
  5. Step 5: Solve for x
    x = 330,043,466.70/28,497.50
  6. Step 6: Final answer
    x = 11,581.49

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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.