Home / 20,437.21-28,195.18-12,881.53

Finding the Fourth Proportional to 20,437.21, 28,195.18 and 12,881.53

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Solution

The fourth proportional to 20,437.21, 28,195.18 and 12,881.53 is: 17,771.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,437.21 : 28,195.18 = 12,881.53 : x
  2. Step 2: Convert to fraction form
    20,437.21/28,195.18 = 12,881.53/x
  3. Step 3: Cross multiply
    20,437.21x = 28,195.18 × 12,881.53
  4. Step 4: Simplify right side
    20,437.21x = 363,197,057.03
  5. Step 5: Solve for x
    x = 363,197,057.03/20,437.21
  6. Step 6: Final answer
    x = 17,771.36

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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.