Home / 15,512.88-21,398.18-13,528.20

Finding the Fourth Proportional to 15,512.88, 21,398.18 and 13,528.20

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Solution

The fourth proportional to 15,512.88, 21,398.18 and 13,528.20 is: 18,660.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,512.88 : 21,398.18 = 13,528.20 : x
  2. Step 2: Convert to fraction form
    15,512.88/21,398.18 = 13,528.20/x
  3. Step 3: Cross multiply
    15,512.88x = 21,398.18 × 13,528.20
  4. Step 4: Simplify right side
    15,512.88x = 289,478,791.04
  5. Step 5: Solve for x
    x = 289,478,791.04/15,512.88
  6. Step 6: Final answer
    x = 18,660.54

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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.