Home / 20,111.15-27,752.93-11,158.53

Finding the Fourth Proportional to 20,111.15, 27,752.93 and 11,158.53

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Solution

The fourth proportional to 20,111.15, 27,752.93 and 11,158.53 is: 15,398.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,111.15 : 27,752.93 = 11,158.53 : x
  2. Step 2: Convert to fraction form
    20,111.15/27,752.93 = 11,158.53/x
  3. Step 3: Cross multiply
    20,111.15x = 27,752.93 × 11,158.53
  4. Step 4: Simplify right side
    20,111.15x = 309,681,783.97
  5. Step 5: Solve for x
    x = 309,681,783.97/20,111.15
  6. Step 6: Final answer
    x = 15,398.51

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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.