Home / 15,708.06-21,678.48-8,635.86

Finding the Fourth Proportional to 15,708.06, 21,678.48 and 8,635.86

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Solution

The fourth proportional to 15,708.06, 21,678.48 and 8,635.86 is: 11,918.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,708.06 : 21,678.48 = 8,635.86 : x
  2. Step 2: Convert to fraction form
    15,708.06/21,678.48 = 8,635.86/x
  3. Step 3: Cross multiply
    15,708.06x = 21,678.48 × 8,635.86
  4. Step 4: Simplify right side
    15,708.06x = 187,212,318.29
  5. Step 5: Solve for x
    x = 187,212,318.29/15,708.06
  6. Step 6: Final answer
    x = 11,918.23

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.