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Finding the Fourth Proportional to 19,681.68, 27,168.30 and 14,418.30

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Solution

The fourth proportional to 19,681.68, 27,168.30 and 14,418.30 is: 19,902.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,681.68 : 27,168.30 = 14,418.30 : x
  2. Step 2: Convert to fraction form
    19,681.68/27,168.30 = 14,418.30/x
  3. Step 3: Cross multiply
    19,681.68x = 27,168.30 × 14,418.30
  4. Step 4: Simplify right side
    19,681.68x = 391,720,699.89
  5. Step 5: Solve for x
    x = 391,720,699.89/19,681.68
  6. Step 6: Final answer
    x = 19,902.81

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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.