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Finding the Fourth Proportional to 21,796.68, 30,082.14 and 12,368.28

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Solution

The fourth proportional to 21,796.68, 30,082.14 and 12,368.28 is: 17,069.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,796.68 : 30,082.14 = 12,368.28 : x
  2. Step 2: Convert to fraction form
    21,796.68/30,082.14 = 12,368.28/x
  3. Step 3: Cross multiply
    21,796.68x = 30,082.14 × 12,368.28
  4. Step 4: Simplify right side
    21,796.68x = 372,064,330.52
  5. Step 5: Solve for x
    x = 372,064,330.52/21,796.68
  6. Step 6: Final answer
    x = 17,069.77

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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.