Home / 19,939.70-27,515.90-10,987.12

Finding the Fourth Proportional to 19,939.70, 27,515.90 and 10,987.12

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Solution

The fourth proportional to 19,939.70, 27,515.90 and 10,987.12 is: 15,161.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,939.70 : 27,515.90 = 10,987.12 : x
  2. Step 2: Convert to fraction form
    19,939.70/27,515.90 = 10,987.12/x
  3. Step 3: Cross multiply
    19,939.70x = 27,515.90 × 10,987.12
  4. Step 4: Simplify right side
    19,939.70x = 302,320,495.21
  5. Step 5: Solve for x
    x = 302,320,495.21/19,939.70
  6. Step 6: Final answer
    x = 15,161.74

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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.