Home / 20,581.81-28,402.90-11,150.37

Finding the Fourth Proportional to 20,581.81, 28,402.90 and 11,150.37

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Solution

The fourth proportional to 20,581.81, 28,402.90 and 11,150.37 is: 15,387.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,581.81 : 28,402.90 = 11,150.37 : x
  2. Step 2: Convert to fraction form
    20,581.81/28,402.90 = 11,150.37/x
  3. Step 3: Cross multiply
    20,581.81x = 28,402.90 × 11,150.37
  4. Step 4: Simplify right side
    20,581.81x = 316,702,922.71
  5. Step 5: Solve for x
    x = 316,702,922.71/20,581.81
  6. Step 6: Final answer
    x = 15,387.51

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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.