Home / 10,129.40-13,976.79-5,652.80

Finding the Fourth Proportional to 10,129.40, 13,976.79 and 5,652.80

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Solution

The fourth proportional to 10,129.40, 13,976.79 and 5,652.80 is: 7,799.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,129.40 : 13,976.79 = 5,652.80 : x
  2. Step 2: Convert to fraction form
    10,129.40/13,976.79 = 5,652.80/x
  3. Step 3: Cross multiply
    10,129.40x = 13,976.79 × 5,652.80
  4. Step 4: Simplify right side
    10,129.40x = 79,007,998.51
  5. Step 5: Solve for x
    x = 79,007,998.51/10,129.40
  6. Step 6: Final answer
    x = 7,799.87

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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.