Home / 12,175.20-18,155.90-12,064.32

Finding the Fourth Proportional to 12,175.20, 18,155.90 and 12,064.32

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Solution

The fourth proportional to 12,175.20, 18,155.90 and 12,064.32 is: 17,990.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,175.20 : 18,155.90 = 12,064.32 : x
  2. Step 2: Convert to fraction form
    12,175.20/18,155.90 = 12,064.32/x
  3. Step 3: Cross multiply
    12,175.20x = 18,155.90 × 12,064.32
  4. Step 4: Simplify right side
    12,175.20x = 219,038,617.65
  5. Step 5: Solve for x
    x = 219,038,617.65/12,175.20
  6. Step 6: Final answer
    x = 17,990.56

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.