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Finding the Fourth Proportional to 22,881.60, 31,581.60 and 13,455.60

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Solution

The fourth proportional to 22,881.60, 31,581.60 and 13,455.60 is: 18,571.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,881.60 : 31,581.60 = 13,455.60 : x
  2. Step 2: Convert to fraction form
    22,881.60/31,581.60 = 13,455.60/x
  3. Step 3: Cross multiply
    22,881.60x = 31,581.60 × 13,455.60
  4. Step 4: Simplify right side
    22,881.60x = 424,949,376.96
  5. Step 5: Solve for x
    x = 424,949,376.96/22,881.60
  6. Step 6: Final answer
    x = 18,571.66

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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.