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Finding the Fourth Proportional to 11,883.60, 17,820.18 and 5,645.40

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Solution

The fourth proportional to 11,883.60, 17,820.18 and 5,645.40 is: 8,465.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,883.60 : 17,820.18 = 5,645.40 : x
  2. Step 2: Convert to fraction form
    11,883.60/17,820.18 = 5,645.40/x
  3. Step 3: Cross multiply
    11,883.60x = 17,820.18 × 5,645.40
  4. Step 4: Simplify right side
    11,883.60x = 100,602,044.17
  5. Step 5: Solve for x
    x = 100,602,044.17/11,883.60
  6. Step 6: Final answer
    x = 8,465.62

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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.