Home / 43,145.55-64,718.33-11,980.80

Finding the Fourth Proportional to 43,145.55, 64,718.33 and 11,980.80

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Solution

The fourth proportional to 43,145.55, 64,718.33 and 11,980.80 is: 17,971.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,145.55 : 64,718.33 = 11,980.80 : x
  2. Step 2: Convert to fraction form
    43,145.55/64,718.33 = 11,980.80/x
  3. Step 3: Cross multiply
    43,145.55x = 64,718.33 × 11,980.80
  4. Step 4: Simplify right side
    43,145.55x = 775,377,308.16
  5. Step 5: Solve for x
    x = 775,377,308.16/43,145.55
  6. Step 6: Final answer
    x = 17,971.20

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Similar ratio
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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.