Home / 10,970.97-15,138.93-6,720.09

Finding the Fourth Proportional to 10,970.97, 15,138.93 and 6,720.09

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Solution

The fourth proportional to 10,970.97, 15,138.93 and 6,720.09 is: 9,273.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,970.97 : 15,138.93 = 6,720.09 : x
  2. Step 2: Convert to fraction form
    10,970.97/15,138.93 = 6,720.09/x
  3. Step 3: Cross multiply
    10,970.97x = 15,138.93 × 6,720.09
  4. Step 4: Simplify right side
    10,970.97x = 101,734,972.10
  5. Step 5: Solve for x
    x = 101,734,972.10/10,970.97
  6. Step 6: Final answer
    x = 9,273.11

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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.