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Finding the Fourth Proportional to 21,959, 30,303.30 and 11,887.46

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Solution

The fourth proportional to 21,959, 30,303.30 and 11,887.46 is: 16,404.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,959 : 30,303.30 = 11,887.46 : x
  2. Step 2: Convert to fraction form
    21,959/30,303.30 = 11,887.46/x
  3. Step 3: Cross multiply
    21,959x = 30,303.30 × 11,887.46
  4. Step 4: Simplify right side
    21,959x = 360,229,266.62
  5. Step 5: Solve for x
    x = 360,229,266.62/21,959
  6. Step 6: Final answer
    x = 16,404.63

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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.