Home / 10,328.20-15,530.70-8,638.60

Finding the Fourth Proportional to 10,328.20, 15,530.70 and 8,638.60

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Solution

The fourth proportional to 10,328.20, 15,530.70 and 8,638.60 is: 12,990.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,328.20 : 15,530.70 = 8,638.60 : x
  2. Step 2: Convert to fraction form
    10,328.20/15,530.70 = 8,638.60/x
  3. Step 3: Cross multiply
    10,328.20x = 15,530.70 × 8,638.60
  4. Step 4: Simplify right side
    10,328.20x = 134,163,505.02
  5. Step 5: Solve for x
    x = 134,163,505.02/10,328.20
  6. Step 6: Final answer
    x = 12,990.02

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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.