Home / 14,133.20-21,199.80-4,279.40

Finding the Fourth Proportional to 14,133.20, 21,199.80 and 4,279.40

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Solution

The fourth proportional to 14,133.20, 21,199.80 and 4,279.40 is: 6,419.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,133.20 : 21,199.80 = 4,279.40 : x
  2. Step 2: Convert to fraction form
    14,133.20/21,199.80 = 4,279.40/x
  3. Step 3: Cross multiply
    14,133.20x = 21,199.80 × 4,279.40
  4. Step 4: Simplify right side
    14,133.20x = 90,722,424.12
  5. Step 5: Solve for x
    x = 90,722,424.12/14,133.20
  6. Step 6: Final answer
    x = 6,419.10

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Similar ratio
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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.