Home / 11,838.75-17,746.10-7,681.40

Finding the Fourth Proportional to 11,838.75, 17,746.10 and 7,681.40

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Solution

The fourth proportional to 11,838.75, 17,746.10 and 7,681.40 is: 11,514.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,838.75 : 17,746.10 = 7,681.40 : x
  2. Step 2: Convert to fraction form
    11,838.75/17,746.10 = 7,681.40/x
  3. Step 3: Cross multiply
    11,838.75x = 17,746.10 × 7,681.40
  4. Step 4: Simplify right side
    11,838.75x = 136,314,892.54
  5. Step 5: Solve for x
    x = 136,314,892.54/11,838.75
  6. Step 6: Final answer
    x = 11,514.30

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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.