Home / 13,318.77-19,982-4,312.69

Finding the Fourth Proportional to 13,318.77, 19,982 and 4,312.69

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Solution

The fourth proportional to 13,318.77, 19,982 and 4,312.69 is: 6,470.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,318.77 : 19,982 = 4,312.69 : x
  2. Step 2: Convert to fraction form
    13,318.77/19,982 = 4,312.69/x
  3. Step 3: Cross multiply
    13,318.77x = 19,982 × 4,312.69
  4. Step 4: Simplify right side
    13,318.77x = 86,176,171.58
  5. Step 5: Solve for x
    x = 86,176,171.58/13,318.77
  6. Step 6: Final answer
    x = 6,470.28

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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.