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Finding the Fourth Proportional to 18,371.09, 25,352.02 and 9,987.77

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Solution

The fourth proportional to 18,371.09, 25,352.02 and 9,987.77 is: 13,783.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,371.09 : 25,352.02 = 9,987.77 : x
  2. Step 2: Convert to fraction form
    18,371.09/25,352.02 = 9,987.77/x
  3. Step 3: Cross multiply
    18,371.09x = 25,352.02 × 9,987.77
  4. Step 4: Simplify right side
    18,371.09x = 253,210,144.80
  5. Step 5: Solve for x
    x = 253,210,144.80/18,371.09
  6. Step 6: Final answer
    x = 13,783.08

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Similar ratio
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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.