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Finding the Fourth Proportional to 18,301.31, 25,255.81 and 9,917.81

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Solution

The fourth proportional to 18,301.31, 25,255.81 and 9,917.81 is: 13,686.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,301.31 : 25,255.81 = 9,917.81 : x
  2. Step 2: Convert to fraction form
    18,301.31/25,255.81 = 9,917.81/x
  3. Step 3: Cross multiply
    18,301.31x = 25,255.81 × 9,917.81
  4. Step 4: Simplify right side
    18,301.31x = 250,482,400.51
  5. Step 5: Solve for x
    x = 250,482,400.51/18,301.31
  6. Step 6: Final answer
    x = 13,686.58

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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.