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Finding the Fourth Proportional to 21,959.01, 30,307.91 and 14,887.71

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Solution

The fourth proportional to 21,959.01, 30,307.91 and 14,887.71 is: 20,548.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,959.01 : 30,307.91 = 14,887.71 : x
  2. Step 2: Convert to fraction form
    21,959.01/30,307.91 = 14,887.71/x
  3. Step 3: Cross multiply
    21,959.01x = 30,307.91 × 14,887.71
  4. Step 4: Simplify right side
    21,959.01x = 451,215,300.35
  5. Step 5: Solve for x
    x = 451,215,300.35/21,959.01
  6. Step 6: Final answer
    x = 20,548.07

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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.