Home / 19,111.20-28,666.80-13,279.20

Finding the Fourth Proportional to 19,111.20, 28,666.80 and 13,279.20

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Solution

The fourth proportional to 19,111.20, 28,666.80 and 13,279.20 is: 19,918.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,111.20 : 28,666.80 = 13,279.20 : x
  2. Step 2: Convert to fraction form
    19,111.20/28,666.80 = 13,279.20/x
  3. Step 3: Cross multiply
    19,111.20x = 28,666.80 × 13,279.20
  4. Step 4: Simplify right side
    19,111.20x = 380,672,170.56
  5. Step 5: Solve for x
    x = 380,672,170.56/19,111.20
  6. Step 6: Final answer
    x = 19,918.80

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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.