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Finding the Fourth Proportional to 18,578.71, 25,638.80 and 10,080.80

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Solution

The fourth proportional to 18,578.71, 25,638.80 and 10,080.80 is: 13,911.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,578.71 : 25,638.80 = 10,080.80 : x
  2. Step 2: Convert to fraction form
    18,578.71/25,638.80 = 10,080.80/x
  3. Step 3: Cross multiply
    18,578.71x = 25,638.80 × 10,080.80
  4. Step 4: Simplify right side
    18,578.71x = 258,459,615.04
  5. Step 5: Solve for x
    x = 258,459,615.04/18,578.71
  6. Step 6: Final answer
    x = 13,911.60

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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.