Home / 20,402.26-28,156.56-11,328.10

Finding the Fourth Proportional to 20,402.26, 28,156.56 and 11,328.10

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Solution

The fourth proportional to 20,402.26, 28,156.56 and 11,328.10 is: 15,633.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,402.26 : 28,156.56 = 11,328.10 : x
  2. Step 2: Convert to fraction form
    20,402.26/28,156.56 = 11,328.10/x
  3. Step 3: Cross multiply
    20,402.26x = 28,156.56 × 11,328.10
  4. Step 4: Simplify right side
    20,402.26x = 318,960,327.34
  5. Step 5: Solve for x
    x = 318,960,327.34/20,402.26
  6. Step 6: Final answer
    x = 15,633.58

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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.