Home / 13,605.49-20,388.76-7,750.00

Finding the Fourth Proportional to 13,605.49, 20,388.76 and 7,750.00

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Solution

The fourth proportional to 13,605.49, 20,388.76 and 7,750.00 is: 11,613.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,605.49 : 20,388.76 = 7,750.00 : x
  2. Step 2: Convert to fraction form
    13,605.49/20,388.76 = 7,750.00/x
  3. Step 3: Cross multiply
    13,605.49x = 20,388.76 × 7,750.00
  4. Step 4: Simplify right side
    13,605.49x = 158,012,848.72
  5. Step 5: Solve for x
    x = 158,012,848.72/13,605.49
  6. Step 6: Final answer
    x = 11,613.91

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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.