Home / 13,113.74-19,687.76-7,786.65

Finding the Fourth Proportional to 13,113.74, 19,687.76 and 7,786.65

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Solution

The fourth proportional to 13,113.74, 19,687.76 and 7,786.65 is: 11,690.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,113.74 : 19,687.76 = 7,786.65 : x
  2. Step 2: Convert to fraction form
    13,113.74/19,687.76 = 7,786.65/x
  3. Step 3: Cross multiply
    13,113.74x = 19,687.76 × 7,786.65
  4. Step 4: Simplify right side
    13,113.74x = 153,301,730.47
  5. Step 5: Solve for x
    x = 153,301,730.47/13,113.74
  6. Step 6: Final answer
    x = 11,690.16

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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.