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Finding the Fourth Proportional to 25,461.20, 38,220.60 and 19,643.60

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Solution

The fourth proportional to 25,461.20, 38,220.60 and 19,643.60 is: 29,487.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,461.20 : 38,220.60 = 19,643.60 : x
  2. Step 2: Convert to fraction form
    25,461.20/38,220.60 = 19,643.60/x
  3. Step 3: Cross multiply
    25,461.20x = 38,220.60 × 19,643.60
  4. Step 4: Simplify right side
    25,461.20x = 750,790,178.16
  5. Step 5: Solve for x
    x = 750,790,178.16/25,461.20
  6. Step 6: Final answer
    x = 29,487.62

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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.