Home / 20,570.82-28,387.53-11,139.22

Finding the Fourth Proportional to 20,570.82, 28,387.53 and 11,139.22

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Solution

The fourth proportional to 20,570.82, 28,387.53 and 11,139.22 is: 15,372.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,570.82 : 28,387.53 = 11,139.22 : x
  2. Step 2: Convert to fraction form
    20,570.82/28,387.53 = 11,139.22/x
  3. Step 3: Cross multiply
    20,570.82x = 28,387.53 × 11,139.22
  4. Step 4: Simplify right side
    20,570.82x = 316,214,941.93
  5. Step 5: Solve for x
    x = 316,214,941.93/20,570.82
  6. Step 6: Final answer
    x = 15,372.01

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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.