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Finding the Fourth Proportional to 21,752.66, 30,016.14 and 12,798.20

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Solution

The fourth proportional to 21,752.66, 30,016.14 and 12,798.20 is: 17,660.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,752.66 : 30,016.14 = 12,798.20 : x
  2. Step 2: Convert to fraction form
    21,752.66/30,016.14 = 12,798.20/x
  3. Step 3: Cross multiply
    21,752.66x = 30,016.14 × 12,798.20
  4. Step 4: Simplify right side
    21,752.66x = 384,152,562.95
  5. Step 5: Solve for x
    x = 384,152,562.95/21,752.66
  6. Step 6: Final answer
    x = 17,660.03

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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.