Home / 28,200.14-38,916.20-16,870.12

Finding the Fourth Proportional to 28,200.14, 38,916.20 and 16,870.12

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Solution

The fourth proportional to 28,200.14, 38,916.20 and 16,870.12 is: 23,280.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,200.14 : 38,916.20 = 16,870.12 : x
  2. Step 2: Convert to fraction form
    28,200.14/38,916.20 = 16,870.12/x
  3. Step 3: Cross multiply
    28,200.14x = 38,916.20 × 16,870.12
  4. Step 4: Simplify right side
    28,200.14x = 656,520,782.30
  5. Step 5: Solve for x
    x = 656,520,782.30/28,200.14
  6. Step 6: Final answer
    x = 23,280.76

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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.