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Finding the Fourth Proportional to 28,249.68, 38,984.04 and 15,674.16

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Solution

The fourth proportional to 28,249.68, 38,984.04 and 15,674.16 is: 21,630.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,249.68 : 38,984.04 = 15,674.16 : x
  2. Step 2: Convert to fraction form
    28,249.68/38,984.04 = 15,674.16/x
  3. Step 3: Cross multiply
    28,249.68x = 38,984.04 × 15,674.16
  4. Step 4: Simplify right side
    28,249.68x = 611,042,080.41
  5. Step 5: Solve for x
    x = 611,042,080.41/28,249.68
  6. Step 6: Final answer
    x = 21,630.05

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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.