Home / 15,689.50-21,604.12-13,561.22

Finding the Fourth Proportional to 15,689.50, 21,604.12 and 13,561.22

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Solution

The fourth proportional to 15,689.50, 21,604.12 and 13,561.22 is: 18,673.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,689.50 : 21,604.12 = 13,561.22 : x
  2. Step 2: Convert to fraction form
    15,689.50/21,604.12 = 13,561.22/x
  3. Step 3: Cross multiply
    15,689.50x = 21,604.12 × 13,561.22
  4. Step 4: Simplify right side
    15,689.50x = 292,978,244.33
  5. Step 5: Solve for x
    x = 292,978,244.33/15,689.50
  6. Step 6: Final answer
    x = 18,673.53

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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.