Home / 15,521.72-21,419.30-8,448.12

Finding the Fourth Proportional to 15,521.72, 21,419.30 and 8,448.12

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Solution

The fourth proportional to 15,521.72, 21,419.30 and 8,448.12 is: 11,658.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,521.72 : 21,419.30 = 8,448.12 : x
  2. Step 2: Convert to fraction form
    15,521.72/21,419.30 = 8,448.12/x
  3. Step 3: Cross multiply
    15,521.72x = 21,419.30 × 8,448.12
  4. Step 4: Simplify right side
    15,521.72x = 180,952,837.84
  5. Step 5: Solve for x
    x = 180,952,837.84/15,521.72
  6. Step 6: Final answer
    x = 11,658.04

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.