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Finding the Fourth Proportional to 7,281.80, 10,925.89 and 5,215.08

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Solution

The fourth proportional to 7,281.80, 10,925.89 and 5,215.08 is: 7,824.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,281.80 : 10,925.89 = 5,215.08 : x
  2. Step 2: Convert to fraction form
    7,281.80/10,925.89 = 5,215.08/x
  3. Step 3: Cross multiply
    7,281.80x = 10,925.89 × 5,215.08
  4. Step 4: Simplify right side
    7,281.80x = 56,979,418.36
  5. Step 5: Solve for x
    x = 56,979,418.36/7,281.80
  6. Step 6: Final answer
    x = 7,824.91

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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.