Home / 10,661.68-15,988.38-5,111.56

Finding the Fourth Proportional to 10,661.68, 15,988.38 and 5,111.56

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Solution

The fourth proportional to 10,661.68, 15,988.38 and 5,111.56 is: 7,665.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,661.68 : 15,988.38 = 5,111.56 : x
  2. Step 2: Convert to fraction form
    10,661.68/15,988.38 = 5,111.56/x
  3. Step 3: Cross multiply
    10,661.68x = 15,988.38 × 5,111.56
  4. Step 4: Simplify right side
    10,661.68x = 81,725,563.67
  5. Step 5: Solve for x
    x = 81,725,563.67/10,661.68
  6. Step 6: Final answer
    x = 7,665.36

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.