Home / 7,411.20-11,116.80-7,281.60

Finding the Fourth Proportional to 7,411.20, 11,116.80 and 7,281.60

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Solution

The fourth proportional to 7,411.20, 11,116.80 and 7,281.60 is: 10,922.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,411.20 : 11,116.80 = 7,281.60 : x
  2. Step 2: Convert to fraction form
    7,411.20/11,116.80 = 7,281.60/x
  3. Step 3: Cross multiply
    7,411.20x = 11,116.80 × 7,281.60
  4. Step 4: Simplify right side
    7,411.20x = 80,948,090.88
  5. Step 5: Solve for x
    x = 80,948,090.88/7,411.20
  6. Step 6: Final answer
    x = 10,922.40

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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.