Home / 20,742.92-28,627.43-12,681.29

Finding the Fourth Proportional to 20,742.92, 28,627.43 and 12,681.29

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Solution

The fourth proportional to 20,742.92, 28,627.43 and 12,681.29 is: 17,501.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,742.92 : 28,627.43 = 12,681.29 : x
  2. Step 2: Convert to fraction form
    20,742.92/28,627.43 = 12,681.29/x
  3. Step 3: Cross multiply
    20,742.92x = 28,627.43 × 12,681.29
  4. Step 4: Simplify right side
    20,742.92x = 363,032,749.95
  5. Step 5: Solve for x
    x = 363,032,749.95/20,742.92
  6. Step 6: Final answer
    x = 17,501.53

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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.