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Finding the Fourth Proportional to 28,041.72, 38,698.04 and 15,294.91

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Solution

The fourth proportional to 28,041.72, 38,698.04 and 15,294.91 is: 21,107.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,041.72 : 38,698.04 = 15,294.91 : x
  2. Step 2: Convert to fraction form
    28,041.72/38,698.04 = 15,294.91/x
  3. Step 3: Cross multiply
    28,041.72x = 38,698.04 × 15,294.91
  4. Step 4: Simplify right side
    28,041.72x = 591,882,850.55
  5. Step 5: Solve for x
    x = 591,882,850.55/28,041.72
  6. Step 6: Final answer
    x = 21,107.22

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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.