Home / 21,521.76-32,280.24-7,479.36

Finding the Fourth Proportional to 21,521.76, 32,280.24 and 7,479.36

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Solution

The fourth proportional to 21,521.76, 32,280.24 and 7,479.36 is: 11,218.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,521.76 : 32,280.24 = 7,479.36 : x
  2. Step 2: Convert to fraction form
    21,521.76/32,280.24 = 7,479.36/x
  3. Step 3: Cross multiply
    21,521.76x = 32,280.24 × 7,479.36
  4. Step 4: Simplify right side
    21,521.76x = 241,435,535.85
  5. Step 5: Solve for x
    x = 241,435,535.85/21,521.76
  6. Step 6: Final answer
    x = 11,218.21

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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.