Home / 20,560.55-28,358.88-14,189.55

Finding the Fourth Proportional to 20,560.55, 28,358.88 and 14,189.55

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Solution

The fourth proportional to 20,560.55, 28,358.88 and 14,189.55 is: 19,571.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,560.55 : 28,358.88 = 14,189.55 : x
  2. Step 2: Convert to fraction form
    20,560.55/28,358.88 = 14,189.55/x
  3. Step 3: Cross multiply
    20,560.55x = 28,358.88 × 14,189.55
  4. Step 4: Simplify right side
    20,560.55x = 402,399,745.70
  5. Step 5: Solve for x
    x = 402,399,745.70/20,560.55
  6. Step 6: Final answer
    x = 19,571.45

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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.