Home / 10,421.20-15,644.60-5,230.80

Finding the Fourth Proportional to 10,421.20, 15,644.60 and 5,230.80

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Solution

The fourth proportional to 10,421.20, 15,644.60 and 5,230.80 is: 7,852.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,421.20 : 15,644.60 = 5,230.80 : x
  2. Step 2: Convert to fraction form
    10,421.20/15,644.60 = 5,230.80/x
  3. Step 3: Cross multiply
    10,421.20x = 15,644.60 × 5,230.80
  4. Step 4: Simplify right side
    10,421.20x = 81,833,773.68
  5. Step 5: Solve for x
    x = 81,833,773.68/10,421.20
  6. Step 6: Final answer
    x = 7,852.62

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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.