Home / 13,153.20-19,729.80-3,918

Finding the Fourth Proportional to 13,153.20, 19,729.80 and 3,918

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Solution

The fourth proportional to 13,153.20, 19,729.80 and 3,918 is: 5,877.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,153.20 : 19,729.80 = 3,918 : x
  2. Step 2: Convert to fraction form
    13,153.20/19,729.80 = 3,918/x
  3. Step 3: Cross multiply
    13,153.20x = 19,729.80 × 3,918
  4. Step 4: Simplify right side
    13,153.20x = 77,301,356.40
  5. Step 5: Solve for x
    x = 77,301,356.40/13,153.20
  6. Step 6: Final answer
    x = 5,877.00

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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.