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Finding the Fourth Proportional to 20,073.99, 27,715.11 and 12,907.13

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Solution

The fourth proportional to 20,073.99, 27,715.11 and 12,907.13 is: 17,820.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,073.99 : 27,715.11 = 12,907.13 : x
  2. Step 2: Convert to fraction form
    20,073.99/27,715.11 = 12,907.13/x
  3. Step 3: Cross multiply
    20,073.99x = 27,715.11 × 12,907.13
  4. Step 4: Simplify right side
    20,073.99x = 357,722,389.16
  5. Step 5: Solve for x
    x = 357,722,389.16/20,073.99
  6. Step 6: Final answer
    x = 17,820.19

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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.