Home / 10,488.80-15,725.20-5,298.40

Finding the Fourth Proportional to 10,488.80, 15,725.20 and 5,298.40

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Solution

The fourth proportional to 10,488.80, 15,725.20 and 5,298.40 is: 7,943.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,488.80 : 15,725.20 = 5,298.40 : x
  2. Step 2: Convert to fraction form
    10,488.80/15,725.20 = 5,298.40/x
  3. Step 3: Cross multiply
    10,488.80x = 15,725.20 × 5,298.40
  4. Step 4: Simplify right side
    10,488.80x = 83,318,399.68
  5. Step 5: Solve for x
    x = 83,318,399.68/10,488.80
  6. Step 6: Final answer
    x = 7,943.56

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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.