Home / 7,980.13-11,947.70-4,223.40

Finding the Fourth Proportional to 7,980.13, 11,947.70 and 4,223.40

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Solution

The fourth proportional to 7,980.13, 11,947.70 and 4,223.40 is: 6,323.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,980.13 : 11,947.70 = 4,223.40 : x
  2. Step 2: Convert to fraction form
    7,980.13/11,947.70 = 4,223.40/x
  3. Step 3: Cross multiply
    7,980.13x = 11,947.70 × 4,223.40
  4. Step 4: Simplify right side
    7,980.13x = 50,459,939.87
  5. Step 5: Solve for x
    x = 50,459,939.87/7,980.13
  6. Step 6: Final answer
    x = 6,323.20

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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.