Home / 21,005.48-28,988.78-12,052.92

Finding the Fourth Proportional to 21,005.48, 28,988.78 and 12,052.92

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Solution

The fourth proportional to 21,005.48, 28,988.78 and 12,052.92 is: 16,633.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,005.48 : 28,988.78 = 12,052.92 : x
  2. Step 2: Convert to fraction form
    21,005.48/28,988.78 = 12,052.92/x
  3. Step 3: Cross multiply
    21,005.48x = 28,988.78 × 12,052.92
  4. Step 4: Simplify right side
    21,005.48x = 349,399,446.24
  5. Step 5: Solve for x
    x = 349,399,446.24/21,005.48
  6. Step 6: Final answer
    x = 16,633.73

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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.