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Finding the Fourth Proportional to 21,920.30, 30,250.23 and 11,848.94

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Solution

The fourth proportional to 21,920.30, 30,250.23 and 11,848.94 is: 16,351.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,920.30 : 30,250.23 = 11,848.94 : x
  2. Step 2: Convert to fraction form
    21,920.30/30,250.23 = 11,848.94/x
  3. Step 3: Cross multiply
    21,920.30x = 30,250.23 × 11,848.94
  4. Step 4: Simplify right side
    21,920.30x = 358,433,009.01
  5. Step 5: Solve for x
    x = 358,433,009.01/21,920.30
  6. Step 6: Final answer
    x = 16,351.65

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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.