Home / 10,971.35-15,139.45-6,720.47

Finding the Fourth Proportional to 10,971.35, 15,139.45 and 6,720.47

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Solution

The fourth proportional to 10,971.35, 15,139.45 and 6,720.47 is: 9,273.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,971.35 : 15,139.45 = 6,720.47 : x
  2. Step 2: Convert to fraction form
    10,971.35/15,139.45 = 6,720.47/x
  3. Step 3: Cross multiply
    10,971.35x = 15,139.45 × 6,720.47
  4. Step 4: Simplify right side
    10,971.35x = 101,744,219.54
  5. Step 5: Solve for x
    x = 101,744,219.54/10,971.35
  6. Step 6: Final answer
    x = 9,273.63

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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.