Home / 28,708.80-43,002.72-13,139.52

Finding the Fourth Proportional to 28,708.80, 43,002.72 and 13,139.52

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Solution

The fourth proportional to 28,708.80, 43,002.72 and 13,139.52 is: 19,681.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,708.80 : 43,002.72 = 13,139.52 : x
  2. Step 2: Convert to fraction form
    28,708.80/43,002.72 = 13,139.52/x
  3. Step 3: Cross multiply
    28,708.80x = 43,002.72 × 13,139.52
  4. Step 4: Simplify right side
    28,708.80x = 565,035,099.49
  5. Step 5: Solve for x
    x = 565,035,099.49/28,708.80
  6. Step 6: Final answer
    x = 19,681.60

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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.