Home / 20,673.72-28,528.92-11,242.28

Finding the Fourth Proportional to 20,673.72, 28,528.92 and 11,242.28

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Solution

The fourth proportional to 20,673.72, 28,528.92 and 11,242.28 is: 15,513.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,673.72 : 28,528.92 = 11,242.28 : x
  2. Step 2: Convert to fraction form
    20,673.72/28,528.92 = 11,242.28/x
  3. Step 3: Cross multiply
    20,673.72x = 28,528.92 × 11,242.28
  4. Step 4: Simplify right side
    20,673.72x = 320,730,106.74
  5. Step 5: Solve for x
    x = 320,730,106.74/20,673.72
  6. Step 6: Final answer
    x = 15,513.90

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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.