Home / 13,387.30-20,081.16-5,071.21

Finding the Fourth Proportional to 13,387.30, 20,081.16 and 5,071.21

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Solution

The fourth proportional to 13,387.30, 20,081.16 and 5,071.21 is: 7,606.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,387.30 : 20,081.16 = 5,071.21 : x
  2. Step 2: Convert to fraction form
    13,387.30/20,081.16 = 5,071.21/x
  3. Step 3: Cross multiply
    13,387.30x = 20,081.16 × 5,071.21
  4. Step 4: Simplify right side
    13,387.30x = 101,835,779.40
  5. Step 5: Solve for x
    x = 101,835,779.40/13,387.30
  6. Step 6: Final answer
    x = 7,606.89

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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.