Home / 20,742.48-28,615.14-12,239.10

Finding the Fourth Proportional to 20,742.48, 28,615.14 and 12,239.10

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Solution

The fourth proportional to 20,742.48, 28,615.14 and 12,239.10 is: 16,884.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,742.48 : 28,615.14 = 12,239.10 : x
  2. Step 2: Convert to fraction form
    20,742.48/28,615.14 = 12,239.10/x
  3. Step 3: Cross multiply
    20,742.48x = 28,615.14 × 12,239.10
  4. Step 4: Simplify right side
    20,742.48x = 350,223,559.97
  5. Step 5: Solve for x
    x = 350,223,559.97/20,742.48
  6. Step 6: Final answer
    x = 16,884.36

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.