Home / 7,905.12-11,854.80-3,521.76

Finding the Fourth Proportional to 7,905.12, 11,854.80 and 3,521.76

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Solution

The fourth proportional to 7,905.12, 11,854.80 and 3,521.76 is: 5,281.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,905.12 : 11,854.80 = 3,521.76 : x
  2. Step 2: Convert to fraction form
    7,905.12/11,854.80 = 3,521.76/x
  3. Step 3: Cross multiply
    7,905.12x = 11,854.80 × 3,521.76
  4. Step 4: Simplify right side
    7,905.12x = 41,749,760.45
  5. Step 5: Solve for x
    x = 41,749,760.45/7,905.12
  6. Step 6: Final answer
    x = 5,281.36

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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.