Home / 20,409.23-28,157.49-13,339.76

Finding the Fourth Proportional to 20,409.23, 28,157.49 and 13,339.76

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Solution

The fourth proportional to 20,409.23, 28,157.49 and 13,339.76 is: 18,404.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,409.23 : 28,157.49 = 13,339.76 : x
  2. Step 2: Convert to fraction form
    20,409.23/28,157.49 = 13,339.76/x
  3. Step 3: Cross multiply
    20,409.23x = 28,157.49 × 13,339.76
  4. Step 4: Simplify right side
    20,409.23x = 375,614,018.01
  5. Step 5: Solve for x
    x = 375,614,018.01/20,409.23
  6. Step 6: Final answer
    x = 18,404.12

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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.