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Finding the Fourth Proportional to 21,000.26, 28,981.19 and 12,048.14

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Solution

The fourth proportional to 21,000.26, 28,981.19 and 12,048.14 is: 16,626.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,000.26 : 28,981.19 = 12,048.14 : x
  2. Step 2: Convert to fraction form
    21,000.26/28,981.19 = 12,048.14/x
  3. Step 3: Cross multiply
    21,000.26x = 28,981.19 × 12,048.14
  4. Step 4: Simplify right side
    21,000.26x = 349,169,537.06
  5. Step 5: Solve for x
    x = 349,169,537.06/21,000.26
  6. Step 6: Final answer
    x = 16,626.91

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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.