Home / 8,140.40-12,210.68-5,331.60

Finding the Fourth Proportional to 8,140.40, 12,210.68 and 5,331.60

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Solution

The fourth proportional to 8,140.40, 12,210.68 and 5,331.60 is: 7,997.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,140.40 : 12,210.68 = 5,331.60 : x
  2. Step 2: Convert to fraction form
    8,140.40/12,210.68 = 5,331.60/x
  3. Step 3: Cross multiply
    8,140.40x = 12,210.68 × 5,331.60
  4. Step 4: Simplify right side
    8,140.40x = 65,102,461.49
  5. Step 5: Solve for x
    x = 65,102,461.49/8,140.40
  6. Step 6: Final answer
    x = 7,997.45

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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.