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Finding the Fourth Proportional to 17,720.24, 26,581.31 and 7,188.68

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Solution

The fourth proportional to 17,720.24, 26,581.31 and 7,188.68 is: 10,783.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,720.24 : 26,581.31 = 7,188.68 : x
  2. Step 2: Convert to fraction form
    17,720.24/26,581.31 = 7,188.68/x
  3. Step 3: Cross multiply
    17,720.24x = 26,581.31 × 7,188.68
  4. Step 4: Simplify right side
    17,720.24x = 191,084,362.72
  5. Step 5: Solve for x
    x = 191,084,362.72/17,720.24
  6. Step 6: Final answer
    x = 10,783.40

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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.