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Finding the Fourth Proportional to 28,218.92, 38,943.04 and 15,473.11

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Solution

The fourth proportional to 28,218.92, 38,943.04 and 15,473.11 is: 21,353.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,218.92 : 38,943.04 = 15,473.11 : x
  2. Step 2: Convert to fraction form
    28,218.92/38,943.04 = 15,473.11/x
  3. Step 3: Cross multiply
    28,218.92x = 38,943.04 × 15,473.11
  4. Step 4: Simplify right side
    28,218.92x = 602,569,941.65
  5. Step 5: Solve for x
    x = 602,569,941.65/28,218.92
  6. Step 6: Final answer
    x = 21,353.40

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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.