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Finding the Fourth Proportional to 21,751.66, 30,014.76 and 12,797.20

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Solution

The fourth proportional to 21,751.66, 30,014.76 and 12,797.20 is: 17,658.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,751.66 : 30,014.76 = 12,797.20 : x
  2. Step 2: Convert to fraction form
    21,751.66/30,014.76 = 12,797.20/x
  3. Step 3: Cross multiply
    21,751.66x = 30,014.76 × 12,797.20
  4. Step 4: Simplify right side
    21,751.66x = 384,104,886.67
  5. Step 5: Solve for x
    x = 384,104,886.67/21,751.66
  6. Step 6: Final answer
    x = 17,658.65

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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.