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Finding the Fourth Proportional to 28,966.52, 39,974.64 and 16,391

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Solution

The fourth proportional to 28,966.52, 39,974.64 and 16,391 is: 22,620.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,966.52 : 39,974.64 = 16,391 : x
  2. Step 2: Convert to fraction form
    28,966.52/39,974.64 = 16,391/x
  3. Step 3: Cross multiply
    28,966.52x = 39,974.64 × 16,391
  4. Step 4: Simplify right side
    28,966.52x = 655,224,324.24
  5. Step 5: Solve for x
    x = 655,224,324.24/28,966.52
  6. Step 6: Final answer
    x = 22,620.06

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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.