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Finding the Fourth Proportional to 21,800.58, 30,083.82 and 12,370.92

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Solution

The fourth proportional to 21,800.58, 30,083.82 and 12,370.92 is: 17,071.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,800.58 : 30,083.82 = 12,370.92 : x
  2. Step 2: Convert to fraction form
    21,800.58/30,083.82 = 12,370.92/x
  3. Step 3: Cross multiply
    21,800.58x = 30,083.82 × 12,370.92
  4. Step 4: Simplify right side
    21,800.58x = 372,164,530.51
  5. Step 5: Solve for x
    x = 372,164,530.51/21,800.58
  6. Step 6: Final answer
    x = 17,071.31

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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.