Home / 15,521.45-21,419.70-8,448.02

Finding the Fourth Proportional to 15,521.45, 21,419.70 and 8,448.02

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Solution

The fourth proportional to 15,521.45, 21,419.70 and 8,448.02 is: 11,658.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,521.45 : 21,419.70 = 8,448.02 : x
  2. Step 2: Convert to fraction form
    15,521.45/21,419.70 = 8,448.02/x
  3. Step 3: Cross multiply
    15,521.45x = 21,419.70 × 8,448.02
  4. Step 4: Simplify right side
    15,521.45x = 180,954,053.99
  5. Step 5: Solve for x
    x = 180,954,053.99/15,521.45
  6. Step 6: Final answer
    x = 11,658.32

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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.