Home / 28,155.10-42,230.22-8,438.08

Finding the Fourth Proportional to 28,155.10, 42,230.22 and 8,438.08

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Solution

The fourth proportional to 28,155.10, 42,230.22 and 8,438.08 is: 12,656.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,155.10 : 42,230.22 = 8,438.08 : x
  2. Step 2: Convert to fraction form
    28,155.10/42,230.22 = 8,438.08/x
  3. Step 3: Cross multiply
    28,155.10x = 42,230.22 × 8,438.08
  4. Step 4: Simplify right side
    28,155.10x = 356,341,974.78
  5. Step 5: Solve for x
    x = 356,341,974.78/28,155.10
  6. Step 6: Final answer
    x = 12,656.39

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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.