Home / 18,425.68-27,638.40-5,278.08

Finding the Fourth Proportional to 18,425.68, 27,638.40 and 5,278.08

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Solution

The fourth proportional to 18,425.68, 27,638.40 and 5,278.08 is: 7,917.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,425.68 : 27,638.40 = 5,278.08 : x
  2. Step 2: Convert to fraction form
    18,425.68/27,638.40 = 5,278.08/x
  3. Step 3: Cross multiply
    18,425.68x = 27,638.40 × 5,278.08
  4. Step 4: Simplify right side
    18,425.68x = 145,877,686.27
  5. Step 5: Solve for x
    x = 145,877,686.27/18,425.68
  6. Step 6: Final answer
    x = 7,917.09

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.