Home / 21,800.78-30,086.04-12,848.66

Finding the Fourth Proportional to 21,800.78, 30,086.04 and 12,848.66

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Solution

The fourth proportional to 21,800.78, 30,086.04 and 12,848.66 is: 17,731.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,800.78 : 30,086.04 = 12,848.66 : x
  2. Step 2: Convert to fraction form
    21,800.78/30,086.04 = 12,848.66/x
  3. Step 3: Cross multiply
    21,800.78x = 30,086.04 × 12,848.66
  4. Step 4: Simplify right side
    21,800.78x = 386,565,298.71
  5. Step 5: Solve for x
    x = 386,565,298.71/21,800.78
  6. Step 6: Final answer
    x = 17,731.72

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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.