Home / 21,887.69-30,173.49-15,589.13

Finding the Fourth Proportional to 21,887.69, 30,173.49 and 15,589.13

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Solution

The fourth proportional to 21,887.69, 30,173.49 and 15,589.13 is: 21,490.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,887.69 : 30,173.49 = 15,589.13 : x
  2. Step 2: Convert to fraction form
    21,887.69/30,173.49 = 15,589.13/x
  3. Step 3: Cross multiply
    21,887.69x = 30,173.49 × 15,589.13
  4. Step 4: Simplify right side
    21,887.69x = 470,378,307.30
  5. Step 5: Solve for x
    x = 470,378,307.30/21,887.69
  6. Step 6: Final answer
    x = 21,490.55

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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.