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Finding the Fourth Proportional to 43,008.71, 64,486.87 and 19,311.65

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Solution

The fourth proportional to 43,008.71, 64,486.87 and 19,311.65 is: 28,955.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,008.71 : 64,486.87 = 19,311.65 : x
  2. Step 2: Convert to fraction form
    43,008.71/64,486.87 = 19,311.65/x
  3. Step 3: Cross multiply
    43,008.71x = 64,486.87 × 19,311.65
  4. Step 4: Simplify right side
    43,008.71x = 1,245,347,863.04
  5. Step 5: Solve for x
    x = 1,245,347,863.04/43,008.71
  6. Step 6: Final answer
    x = 28,955.71

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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.