Home / 20,581.28-30,854.64-13,988.96

Finding the Fourth Proportional to 20,581.28, 30,854.64 and 13,988.96

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Solution

The fourth proportional to 20,581.28, 30,854.64 and 13,988.96 is: 20,971.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,581.28 : 30,854.64 = 13,988.96 : x
  2. Step 2: Convert to fraction form
    20,581.28/30,854.64 = 13,988.96/x
  3. Step 3: Cross multiply
    20,581.28x = 30,854.64 × 13,988.96
  4. Step 4: Simplify right side
    20,581.28x = 431,624,324.77
  5. Step 5: Solve for x
    x = 431,624,324.77/20,581.28
  6. Step 6: Final answer
    x = 20,971.69

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.