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Finding the Fourth Proportional to 21,046.40, 31,569.60 and 17,705.60

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Solution

The fourth proportional to 21,046.40, 31,569.60 and 17,705.60 is: 26,558.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,046.40 : 31,569.60 = 17,705.60 : x
  2. Step 2: Convert to fraction form
    21,046.40/31,569.60 = 17,705.60/x
  3. Step 3: Cross multiply
    21,046.40x = 31,569.60 × 17,705.60
  4. Step 4: Simplify right side
    21,046.40x = 558,958,709.76
  5. Step 5: Solve for x
    x = 558,958,709.76/21,046.40
  6. Step 6: Final answer
    x = 26,558.40

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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.