Home / 18,990.10-28,462.06-13,445.04

Finding the Fourth Proportional to 18,990.10, 28,462.06 and 13,445.04

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Solution

The fourth proportional to 18,990.10, 28,462.06 and 13,445.04 is: 20,151.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,990.10 : 28,462.06 = 13,445.04 : x
  2. Step 2: Convert to fraction form
    18,990.10/28,462.06 = 13,445.04/x
  3. Step 3: Cross multiply
    18,990.10x = 28,462.06 × 13,445.04
  4. Step 4: Simplify right side
    18,990.10x = 382,673,535.18
  5. Step 5: Solve for x
    x = 382,673,535.18/18,990.10
  6. Step 6: Final answer
    x = 20,151.21

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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.