Home / 20,419.45-28,178.51-11,344.62

Finding the Fourth Proportional to 20,419.45, 28,178.51 and 11,344.62

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Solution

The fourth proportional to 20,419.45, 28,178.51 and 11,344.62 is: 15,655.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,419.45 : 28,178.51 = 11,344.62 : x
  2. Step 2: Convert to fraction form
    20,419.45/28,178.51 = 11,344.62/x
  3. Step 3: Cross multiply
    20,419.45x = 28,178.51 × 11,344.62
  4. Step 4: Simplify right side
    20,419.45x = 319,674,347.22
  5. Step 5: Solve for x
    x = 319,674,347.22/20,419.45
  6. Step 6: Final answer
    x = 15,655.38

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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.