Home / 20,514.40-30,742.80-10,103.20

Finding the Fourth Proportional to 20,514.40, 30,742.80 and 10,103.20

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Solution

The fourth proportional to 20,514.40, 30,742.80 and 10,103.20 is: 15,140.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,514.40 : 30,742.80 = 10,103.20 : x
  2. Step 2: Convert to fraction form
    20,514.40/30,742.80 = 10,103.20/x
  3. Step 3: Cross multiply
    20,514.40x = 30,742.80 × 10,103.20
  4. Step 4: Simplify right side
    20,514.40x = 310,600,656.96
  5. Step 5: Solve for x
    x = 310,600,656.96/20,514.40
  6. Step 6: Final answer
    x = 15,140.62

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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.