Home / 20,679.40-30,970.62-15,118.72

Finding the Fourth Proportional to 20,679.40, 30,970.62 and 15,118.72

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Solution

The fourth proportional to 20,679.40, 30,970.62 and 15,118.72 is: 22,642.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,679.40 : 30,970.62 = 15,118.72 : x
  2. Step 2: Convert to fraction form
    20,679.40/30,970.62 = 15,118.72/x
  3. Step 3: Cross multiply
    20,679.40x = 30,970.62 × 15,118.72
  4. Step 4: Simplify right side
    20,679.40x = 468,236,132.01
  5. Step 5: Solve for x
    x = 468,236,132.01/20,679.40
  6. Step 6: Final answer
    x = 22,642.64

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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.