Home / 20,372.70-28,120.30-13,300.18

Finding the Fourth Proportional to 20,372.70, 28,120.30 and 13,300.18

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Solution

The fourth proportional to 20,372.70, 28,120.30 and 13,300.18 is: 18,358.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,372.70 : 28,120.30 = 13,300.18 : x
  2. Step 2: Convert to fraction form
    20,372.70/28,120.30 = 13,300.18/x
  3. Step 3: Cross multiply
    20,372.70x = 28,120.30 × 13,300.18
  4. Step 4: Simplify right side
    20,372.70x = 374,005,051.65
  5. Step 5: Solve for x
    x = 374,005,051.65/20,372.70
  6. Step 6: Final answer
    x = 18,358.15

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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.