Home / 15,561.16-21,365.92-15,155.22

Finding the Fourth Proportional to 15,561.16, 21,365.92 and 15,155.22

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Solution

The fourth proportional to 15,561.16, 21,365.92 and 15,155.22 is: 20,808.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,561.16 : 21,365.92 = 15,155.22 : x
  2. Step 2: Convert to fraction form
    15,561.16/21,365.92 = 15,155.22/x
  3. Step 3: Cross multiply
    15,561.16x = 21,365.92 × 15,155.22
  4. Step 4: Simplify right side
    15,561.16x = 323,805,218.10
  5. Step 5: Solve for x
    x = 323,805,218.10/15,561.16
  6. Step 6: Final answer
    x = 20,808.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.