Home / 8,320.10-12,478.35-3,640.10

Finding the Fourth Proportional to 8,320.10, 12,478.35 and 3,640.10

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Solution

The fourth proportional to 8,320.10, 12,478.35 and 3,640.10 is: 5,459.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,320.10 : 12,478.35 = 3,640.10 : x
  2. Step 2: Convert to fraction form
    8,320.10/12,478.35 = 3,640.10/x
  3. Step 3: Cross multiply
    8,320.10x = 12,478.35 × 3,640.10
  4. Step 4: Simplify right side
    8,320.10x = 45,422,441.84
  5. Step 5: Solve for x
    x = 45,422,441.84/8,320.10
  6. Step 6: Final answer
    x = 5,459.36

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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.