Home / 10,821.60-16,231.20-8,870.40

Finding the Fourth Proportional to 10,821.60, 16,231.20 and 8,870.40

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Solution

The fourth proportional to 10,821.60, 16,231.20 and 8,870.40 is: 13,304.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,821.60 : 16,231.20 = 8,870.40 : x
  2. Step 2: Convert to fraction form
    10,821.60/16,231.20 = 8,870.40/x
  3. Step 3: Cross multiply
    10,821.60x = 16,231.20 × 8,870.40
  4. Step 4: Simplify right side
    10,821.60x = 143,977,236.48
  5. Step 5: Solve for x
    x = 143,977,236.48/10,821.60
  6. Step 6: Final answer
    x = 13,304.62

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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.