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Finding the Fourth Proportional to 28,497.95, 42,746.92 and 7,721.45

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Solution

The fourth proportional to 28,497.95, 42,746.92 and 7,721.45 is: 11,582.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,497.95 : 42,746.92 = 7,721.45 : x
  2. Step 2: Convert to fraction form
    28,497.95/42,746.92 = 7,721.45/x
  3. Step 3: Cross multiply
    28,497.95x = 42,746.92 × 7,721.45
  4. Step 4: Simplify right side
    28,497.95x = 330,067,972.40
  5. Step 5: Solve for x
    x = 330,067,972.40/28,497.95
  6. Step 6: Final answer
    x = 11,582.17

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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.