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Finding the Fourth Proportional to 18,920.98, 28,340.13 and 15,596.74

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Solution

The fourth proportional to 18,920.98, 28,340.13 and 15,596.74 is: 23,361.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,920.98 : 28,340.13 = 15,596.74 : x
  2. Step 2: Convert to fraction form
    18,920.98/28,340.13 = 15,596.74/x
  3. Step 3: Cross multiply
    18,920.98x = 28,340.13 × 15,596.74
  4. Step 4: Simplify right side
    18,920.98x = 442,013,639.18
  5. Step 5: Solve for x
    x = 442,013,639.18/18,920.98
  6. Step 6: Final answer
    x = 23,361.03

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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.