Home / 13,218.74-19,823.52-5,318.90

Finding the Fourth Proportional to 13,218.74, 19,823.52 and 5,318.90

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Solution

The fourth proportional to 13,218.74, 19,823.52 and 5,318.90 is: 7,976.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,218.74 : 19,823.52 = 5,318.90 : x
  2. Step 2: Convert to fraction form
    13,218.74/19,823.52 = 5,318.90/x
  3. Step 3: Cross multiply
    13,218.74x = 19,823.52 × 5,318.90
  4. Step 4: Simplify right side
    13,218.74x = 105,439,320.53
  5. Step 5: Solve for x
    x = 105,439,320.53/13,218.74
  6. Step 6: Final answer
    x = 7,976.50

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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.