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Finding the Fourth Proportional to 20,703.98, 30,960.57 and 15,377.21

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Solution

The fourth proportional to 20,703.98, 30,960.57 and 15,377.21 is: 22,994.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,703.98 : 30,960.57 = 15,377.21 : x
  2. Step 2: Convert to fraction form
    20,703.98/30,960.57 = 15,377.21/x
  3. Step 3: Cross multiply
    20,703.98x = 30,960.57 × 15,377.21
  4. Step 4: Simplify right side
    20,703.98x = 476,087,186.61
  5. Step 5: Solve for x
    x = 476,087,186.61/20,703.98
  6. Step 6: Final answer
    x = 22,994.96

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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.