Home / 10,620.40-15,930.09-4,380.31

Finding the Fourth Proportional to 10,620.40, 15,930.09 and 4,380.31

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Solution

The fourth proportional to 10,620.40, 15,930.09 and 4,380.31 is: 6,570.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,620.40 : 15,930.09 = 4,380.31 : x
  2. Step 2: Convert to fraction form
    10,620.40/15,930.09 = 4,380.31/x
  3. Step 3: Cross multiply
    10,620.40x = 15,930.09 × 4,380.31
  4. Step 4: Simplify right side
    10,620.40x = 69,778,732.53
  5. Step 5: Solve for x
    x = 69,778,732.53/10,620.40
  6. Step 6: Final answer
    x = 6,570.25

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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.