Home / 10,312.80-15,469.20-3,386.40

Finding the Fourth Proportional to 10,312.80, 15,469.20 and 3,386.40

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Solution

The fourth proportional to 10,312.80, 15,469.20 and 3,386.40 is: 5,079.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,312.80 : 15,469.20 = 3,386.40 : x
  2. Step 2: Convert to fraction form
    10,312.80/15,469.20 = 3,386.40/x
  3. Step 3: Cross multiply
    10,312.80x = 15,469.20 × 3,386.40
  4. Step 4: Simplify right side
    10,312.80x = 52,384,898.88
  5. Step 5: Solve for x
    x = 52,384,898.88/10,312.80
  6. Step 6: Final answer
    x = 5,079.60

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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.