Home / 28,871.09-43,320-15,707.78

Finding the Fourth Proportional to 28,871.09, 43,320 and 15,707.78

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Solution

The fourth proportional to 28,871.09, 43,320 and 15,707.78 is: 23,568.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,871.09 : 43,320 = 15,707.78 : x
  2. Step 2: Convert to fraction form
    28,871.09/43,320 = 15,707.78/x
  3. Step 3: Cross multiply
    28,871.09x = 43,320 × 15,707.78
  4. Step 4: Simplify right side
    28,871.09x = 680,461,029.60
  5. Step 5: Solve for x
    x = 680,461,029.60/28,871.09
  6. Step 6: Final answer
    x = 23,568.94

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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.