Home / 15,708.86-21,679.54-8,636.61

Finding the Fourth Proportional to 15,708.86, 21,679.54 and 8,636.61

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Solution

The fourth proportional to 15,708.86, 21,679.54 and 8,636.61 is: 11,919.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,708.86 : 21,679.54 = 8,636.61 : x
  2. Step 2: Convert to fraction form
    15,708.86/21,679.54 = 8,636.61/x
  3. Step 3: Cross multiply
    15,708.86x = 21,679.54 × 8,636.61
  4. Step 4: Simplify right side
    15,708.86x = 187,237,710.37
  5. Step 5: Solve for x
    x = 187,237,710.37/15,708.86
  6. Step 6: Final answer
    x = 11,919.25

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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.