Home / 20,399.08-28,148.70-12,443.26

Finding the Fourth Proportional to 20,399.08, 28,148.70 and 12,443.26

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Solution

The fourth proportional to 20,399.08, 28,148.70 and 12,443.26 is: 17,170.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,399.08 : 28,148.70 = 12,443.26 : x
  2. Step 2: Convert to fraction form
    20,399.08/28,148.70 = 12,443.26/x
  3. Step 3: Cross multiply
    20,399.08x = 28,148.70 × 12,443.26
  4. Step 4: Simplify right side
    20,399.08x = 350,261,592.76
  5. Step 5: Solve for x
    x = 350,261,592.76/20,399.08
  6. Step 6: Final answer
    x = 17,170.46

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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.