Home / 15,709.60-21,679.62-8,636.02

Finding the Fourth Proportional to 15,709.60, 21,679.62 and 8,636.02

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Solution

The fourth proportional to 15,709.60, 21,679.62 and 8,636.02 is: 11,917.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,709.60 : 21,679.62 = 8,636.02 : x
  2. Step 2: Convert to fraction form
    15,709.60/21,679.62 = 8,636.02/x
  3. Step 3: Cross multiply
    15,709.60x = 21,679.62 × 8,636.02
  4. Step 4: Simplify right side
    15,709.60x = 187,225,618.19
  5. Step 5: Solve for x
    x = 187,225,618.19/15,709.60
  6. Step 6: Final answer
    x = 11,917.91

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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.