Home / 18,921.12-26,111.19-10,422.96

Finding the Fourth Proportional to 18,921.12, 26,111.19 and 10,422.96

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Solution

The fourth proportional to 18,921.12, 26,111.19 and 10,422.96 is: 14,383.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,921.12 : 26,111.19 = 10,422.96 : x
  2. Step 2: Convert to fraction form
    18,921.12/26,111.19 = 10,422.96/x
  3. Step 3: Cross multiply
    18,921.12x = 26,111.19 × 10,422.96
  4. Step 4: Simplify right side
    18,921.12x = 272,155,888.92
  5. Step 5: Solve for x
    x = 272,155,888.92/18,921.12
  6. Step 6: Final answer
    x = 14,383.71

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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.