Home / 12,140.40-18,218.70-5,563.20

Finding the Fourth Proportional to 12,140.40, 18,218.70 and 5,563.20

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Solution

The fourth proportional to 12,140.40, 18,218.70 and 5,563.20 is: 8,348.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,140.40 : 18,218.70 = 5,563.20 : x
  2. Step 2: Convert to fraction form
    12,140.40/18,218.70 = 5,563.20/x
  3. Step 3: Cross multiply
    12,140.40x = 18,218.70 × 5,563.20
  4. Step 4: Simplify right side
    12,140.40x = 101,354,271.84
  5. Step 5: Solve for x
    x = 101,354,271.84/12,140.40
  6. Step 6: Final answer
    x = 8,348.51

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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.