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Finding the Fourth Proportional to 21,886.56, 30,201.12 and 12,934.44

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Solution

The fourth proportional to 21,886.56, 30,201.12 and 12,934.44 is: 17,848.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,886.56 : 30,201.12 = 12,934.44 : x
  2. Step 2: Convert to fraction form
    21,886.56/30,201.12 = 12,934.44/x
  3. Step 3: Cross multiply
    21,886.56x = 30,201.12 × 12,934.44
  4. Step 4: Simplify right side
    21,886.56x = 390,634,574.57
  5. Step 5: Solve for x
    x = 390,634,574.57/21,886.56
  6. Step 6: Final answer
    x = 17,848.15

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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.