Home / 21,580.76-29,785.86-13,617.62

Finding the Fourth Proportional to 21,580.76, 29,785.86 and 13,617.62

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Solution

The fourth proportional to 21,580.76, 29,785.86 and 13,617.62 is: 18,795.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,580.76 : 29,785.86 = 13,617.62 : x
  2. Step 2: Convert to fraction form
    21,580.76/29,785.86 = 13,617.62/x
  3. Step 3: Cross multiply
    21,580.76x = 29,785.86 × 13,617.62
  4. Step 4: Simplify right side
    21,580.76x = 405,612,522.85
  5. Step 5: Solve for x
    x = 405,612,522.85/21,580.76
  6. Step 6: Final answer
    x = 18,795.10

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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.