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Finding the Fourth Proportional to 21,751.40, 30,015.50 and 12,797.16

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Solution

The fourth proportional to 21,751.40, 30,015.50 and 12,797.16 is: 17,659.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,751.40 : 30,015.50 = 12,797.16 : x
  2. Step 2: Convert to fraction form
    21,751.40/30,015.50 = 12,797.16/x
  3. Step 3: Cross multiply
    21,751.40x = 30,015.50 × 12,797.16
  4. Step 4: Simplify right side
    21,751.40x = 384,113,155.98
  5. Step 5: Solve for x
    x = 384,113,155.98/21,751.40
  6. Step 6: Final answer
    x = 17,659.24

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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.