Home / 21,768.68-30,041.12-12,693.80

Finding the Fourth Proportional to 21,768.68, 30,041.12 and 12,693.80

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Solution

The fourth proportional to 21,768.68, 30,041.12 and 12,693.80 is: 17,517.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,768.68 : 30,041.12 = 12,693.80 : x
  2. Step 2: Convert to fraction form
    21,768.68/30,041.12 = 12,693.80/x
  3. Step 3: Cross multiply
    21,768.68x = 30,041.12 × 12,693.80
  4. Step 4: Simplify right side
    21,768.68x = 381,335,969.06
  5. Step 5: Solve for x
    x = 381,335,969.06/21,768.68
  6. Step 6: Final answer
    x = 17,517.64

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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.