Home / 7,869.20-10,853.88-5,072

Finding the Fourth Proportional to 7,869.20, 10,853.88 and 5,072

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Solution

The fourth proportional to 7,869.20, 10,853.88 and 5,072 is: 6,995.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,869.20 : 10,853.88 = 5,072 : x
  2. Step 2: Convert to fraction form
    7,869.20/10,853.88 = 5,072/x
  3. Step 3: Cross multiply
    7,869.20x = 10,853.88 × 5,072
  4. Step 4: Simplify right side
    7,869.20x = 55,050,879.36
  5. Step 5: Solve for x
    x = 55,050,879.36/7,869.20
  6. Step 6: Final answer
    x = 6,995.74

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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.