Home / 21,005.28-28,987.04-12,052.98

Finding the Fourth Proportional to 21,005.28, 28,987.04 and 12,052.98

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Solution

The fourth proportional to 21,005.28, 28,987.04 and 12,052.98 is: 16,632.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,005.28 : 28,987.04 = 12,052.98 : x
  2. Step 2: Convert to fraction form
    21,005.28/28,987.04 = 12,052.98/x
  3. Step 3: Cross multiply
    21,005.28x = 28,987.04 × 12,052.98
  4. Step 4: Simplify right side
    21,005.28x = 349,380,213.38
  5. Step 5: Solve for x
    x = 349,380,213.38/21,005.28
  6. Step 6: Final answer
    x = 16,632.97

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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.