Home / 11,678.68-17,486.70-7,287.40

Finding the Fourth Proportional to 11,678.68, 17,486.70 and 7,287.40

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Solution

The fourth proportional to 11,678.68, 17,486.70 and 7,287.40 is: 10,911.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,678.68 : 17,486.70 = 7,287.40 : x
  2. Step 2: Convert to fraction form
    11,678.68/17,486.70 = 7,287.40/x
  3. Step 3: Cross multiply
    11,678.68x = 17,486.70 × 7,287.40
  4. Step 4: Simplify right side
    11,678.68x = 127,432,577.58
  5. Step 5: Solve for x
    x = 127,432,577.58/11,678.68
  6. Step 6: Final answer
    x = 10,911.56

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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.