Home / 18,301.36-25,255.89-9,917.86

Finding the Fourth Proportional to 18,301.36, 25,255.89 and 9,917.86

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Solution

The fourth proportional to 18,301.36, 25,255.89 and 9,917.86 is: 13,686.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,301.36 : 25,255.89 = 9,917.86 : x
  2. Step 2: Convert to fraction form
    18,301.36/25,255.89 = 9,917.86/x
  3. Step 3: Cross multiply
    18,301.36x = 25,255.89 × 9,917.86
  4. Step 4: Simplify right side
    18,301.36x = 250,484,381.20
  5. Step 5: Solve for x
    x = 250,484,381.20/18,301.36
  6. Step 6: Final answer
    x = 13,686.65

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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.