Home / 7,877.20-11,815.80-1,954.12

Finding the Fourth Proportional to 7,877.20, 11,815.80 and 1,954.12

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Solution

The fourth proportional to 7,877.20, 11,815.80 and 1,954.12 is: 2,931.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,877.20 : 11,815.80 = 1,954.12 : x
  2. Step 2: Convert to fraction form
    7,877.20/11,815.80 = 1,954.12/x
  3. Step 3: Cross multiply
    7,877.20x = 11,815.80 × 1,954.12
  4. Step 4: Simplify right side
    7,877.20x = 23,089,491.10
  5. Step 5: Solve for x
    x = 23,089,491.10/7,877.20
  6. Step 6: Final answer
    x = 2,931.18

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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.