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Finding the Fourth Proportional to 21,000.25, 28,977.51 and 12,046.11

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Solution

The fourth proportional to 21,000.25, 28,977.51 and 12,046.11 is: 16,622.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,000.25 : 28,977.51 = 12,046.11 : x
  2. Step 2: Convert to fraction form
    21,000.25/28,977.51 = 12,046.11/x
  3. Step 3: Cross multiply
    21,000.25x = 28,977.51 × 12,046.11
  4. Step 4: Simplify right side
    21,000.25x = 349,066,272.99
  5. Step 5: Solve for x
    x = 349,066,272.99/21,000.25
  6. Step 6: Final answer
    x = 16,622.01

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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.