Home / 28,681.20-43,007.40-13,081.20

Finding the Fourth Proportional to 28,681.20, 43,007.40 and 13,081.20

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Solution

The fourth proportional to 28,681.20, 43,007.40 and 13,081.20 is: 19,615.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,681.20 : 43,007.40 = 13,081.20 : x
  2. Step 2: Convert to fraction form
    28,681.20/43,007.40 = 13,081.20/x
  3. Step 3: Cross multiply
    28,681.20x = 43,007.40 × 13,081.20
  4. Step 4: Simplify right side
    28,681.20x = 562,588,400.88
  5. Step 5: Solve for x
    x = 562,588,400.88/28,681.20
  6. Step 6: Final answer
    x = 19,615.23

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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.