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Finding the Fourth Proportional to 13,318.71, 19,964.02 and 4,431.65

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Solution

The fourth proportional to 13,318.71, 19,964.02 and 4,431.65 is: 6,642.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,318.71 : 19,964.02 = 4,431.65 : x
  2. Step 2: Convert to fraction form
    13,318.71/19,964.02 = 4,431.65/x
  3. Step 3: Cross multiply
    13,318.71x = 19,964.02 × 4,431.65
  4. Step 4: Simplify right side
    13,318.71x = 88,473,588.06
  5. Step 5: Solve for x
    x = 88,473,588.06/13,318.71
  6. Step 6: Final answer
    x = 6,642.80

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1.5x scale

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.