Home / 10,661.20-15,991.79-2,870.02

Finding the Fourth Proportional to 10,661.20, 15,991.79 and 2,870.02

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Solution

The fourth proportional to 10,661.20, 15,991.79 and 2,870.02 is: 4,305.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,661.20 : 15,991.79 = 2,870.02 : x
  2. Step 2: Convert to fraction form
    10,661.20/15,991.79 = 2,870.02/x
  3. Step 3: Cross multiply
    10,661.20x = 15,991.79 × 2,870.02
  4. Step 4: Simplify right side
    10,661.20x = 45,896,742.79
  5. Step 5: Solve for x
    x = 45,896,742.79/10,661.20
  6. Step 6: Final answer
    x = 4,305.03

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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.