Home / 25,587.20-38,438.40-17,811.20

Finding the Fourth Proportional to 25,587.20, 38,438.40 and 17,811.20

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Solution

The fourth proportional to 25,587.20, 38,438.40 and 17,811.20 is: 26,756.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,587.20 : 38,438.40 = 17,811.20 : x
  2. Step 2: Convert to fraction form
    25,587.20/38,438.40 = 17,811.20/x
  3. Step 3: Cross multiply
    25,587.20x = 38,438.40 × 17,811.20
  4. Step 4: Simplify right side
    25,587.20x = 684,634,030.08
  5. Step 5: Solve for x
    x = 684,634,030.08/25,587.20
  6. Step 6: Final answer
    x = 26,756.90

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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.