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Finding the Fourth Proportional to 19,937.88, 27,515.88 and 10,987.20

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Solution

The fourth proportional to 19,937.88, 27,515.88 and 10,987.20 is: 15,163.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,937.88 : 27,515.88 = 10,987.20 : x
  2. Step 2: Convert to fraction form
    19,937.88/27,515.88 = 10,987.20/x
  3. Step 3: Cross multiply
    19,937.88x = 27,515.88 × 10,987.20
  4. Step 4: Simplify right side
    19,937.88x = 302,322,476.74
  5. Step 5: Solve for x
    x = 302,322,476.74/19,937.88
  6. Step 6: Final answer
    x = 15,163.22

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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.