Home / 25,987.72-39,014.40-20,787.52

Finding the Fourth Proportional to 25,987.72, 39,014.40 and 20,787.52

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Solution

The fourth proportional to 25,987.72, 39,014.40 and 20,787.52 is: 31,207.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,987.72 : 39,014.40 = 20,787.52 : x
  2. Step 2: Convert to fraction form
    25,987.72/39,014.40 = 20,787.52/x
  3. Step 3: Cross multiply
    25,987.72x = 39,014.40 × 20,787.52
  4. Step 4: Simplify right side
    25,987.72x = 811,012,620.29
  5. Step 5: Solve for x
    x = 811,012,620.29/25,987.72
  6. Step 6: Final answer
    x = 31,207.53

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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.