Home / 15,521.78-21,419.36-8,448.18

Finding the Fourth Proportional to 15,521.78, 21,419.36 and 8,448.18

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Solution

The fourth proportional to 15,521.78, 21,419.36 and 8,448.18 is: 11,658.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,521.78 : 21,419.36 = 8,448.18 : x
  2. Step 2: Convert to fraction form
    15,521.78/21,419.36 = 8,448.18/x
  3. Step 3: Cross multiply
    15,521.78x = 21,419.36 × 8,448.18
  4. Step 4: Simplify right side
    15,521.78x = 180,954,608.76
  5. Step 5: Solve for x
    x = 180,954,608.76/15,521.78
  6. Step 6: Final answer
    x = 11,658.11

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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.