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Finding the Fourth Proportional to 7,281.20, 10,921.80 and 4,525.40

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Solution

The fourth proportional to 7,281.20, 10,921.80 and 4,525.40 is: 6,788.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,281.20 : 10,921.80 = 4,525.40 : x
  2. Step 2: Convert to fraction form
    7,281.20/10,921.80 = 4,525.40/x
  3. Step 3: Cross multiply
    7,281.20x = 10,921.80 × 4,525.40
  4. Step 4: Simplify right side
    7,281.20x = 49,425,513.72
  5. Step 5: Solve for x
    x = 49,425,513.72/7,281.20
  6. Step 6: Final answer
    x = 6,788.10

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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.