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Finding the Fourth Proportional to 19,329.92, 28,994.88 and 7,637.12

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Solution

The fourth proportional to 19,329.92, 28,994.88 and 7,637.12 is: 11,455.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,329.92 : 28,994.88 = 7,637.12 : x
  2. Step 2: Convert to fraction form
    19,329.92/28,994.88 = 7,637.12/x
  3. Step 3: Cross multiply
    19,329.92x = 28,994.88 × 7,637.12
  4. Step 4: Simplify right side
    19,329.92x = 221,437,377.95
  5. Step 5: Solve for x
    x = 221,437,377.95/19,329.92
  6. Step 6: Final answer
    x = 11,455.68

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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.