Home / 20,503.55-28,110.34-20,129.87

Finding the Fourth Proportional to 20,503.55, 28,110.34 and 20,129.87

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Solution

The fourth proportional to 20,503.55, 28,110.34 and 20,129.87 is: 27,598.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,503.55 : 28,110.34 = 20,129.87 : x
  2. Step 2: Convert to fraction form
    20,503.55/28,110.34 = 20,129.87/x
  3. Step 3: Cross multiply
    20,503.55x = 28,110.34 × 20,129.87
  4. Step 4: Simplify right side
    20,503.55x = 565,857,298.98
  5. Step 5: Solve for x
    x = 565,857,298.98/20,503.55
  6. Step 6: Final answer
    x = 27,598.02

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.