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Finding the Fourth Proportional to 18,371, 25,351.98 and 9,987.50

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Solution

The fourth proportional to 18,371, 25,351.98 and 9,987.50 is: 13,782.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,371 : 25,351.98 = 9,987.50 : x
  2. Step 2: Convert to fraction form
    18,371/25,351.98 = 9,987.50/x
  3. Step 3: Cross multiply
    18,371x = 25,351.98 × 9,987.50
  4. Step 4: Simplify right side
    18,371x = 253,202,900.25
  5. Step 5: Solve for x
    x = 253,202,900.25/18,371
  6. Step 6: Final answer
    x = 13,782.75

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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.