Home / 28,170.84-38,874.24-15,421.55

Finding the Fourth Proportional to 28,170.84, 38,874.24 and 15,421.55

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Solution

The fourth proportional to 28,170.84, 38,874.24 and 15,421.55 is: 21,280.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,170.84 : 38,874.24 = 15,421.55 : x
  2. Step 2: Convert to fraction form
    28,170.84/38,874.24 = 15,421.55/x
  3. Step 3: Cross multiply
    28,170.84x = 38,874.24 × 15,421.55
  4. Step 4: Simplify right side
    28,170.84x = 599,500,841.50
  5. Step 5: Solve for x
    x = 599,500,841.50/28,170.84
  6. Step 6: Final answer
    x = 21,280.90

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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.