Home / 20,378.24-28,134.24-13,316.48

Finding the Fourth Proportional to 20,378.24, 28,134.24 and 13,316.48

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Solution

The fourth proportional to 20,378.24, 28,134.24 and 13,316.48 is: 18,384.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,378.24 : 28,134.24 = 13,316.48 : x
  2. Step 2: Convert to fraction form
    20,378.24/28,134.24 = 13,316.48/x
  3. Step 3: Cross multiply
    20,378.24x = 28,134.24 × 13,316.48
  4. Step 4: Simplify right side
    20,378.24x = 374,649,044.28
  5. Step 5: Solve for x
    x = 374,649,044.28/20,378.24
  6. Step 6: Final answer
    x = 18,384.76

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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.