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Finding the Fourth Proportional to 21,459, 29,603.34 and 15,174.84

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Solution

The fourth proportional to 21,459, 29,603.34 and 15,174.84 is: 20,934.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,459 : 29,603.34 = 15,174.84 : x
  2. Step 2: Convert to fraction form
    21,459/29,603.34 = 15,174.84/x
  3. Step 3: Cross multiply
    21,459x = 29,603.34 × 15,174.84
  4. Step 4: Simplify right side
    21,459x = 449,225,947.97
  5. Step 5: Solve for x
    x = 449,225,947.97/21,459
  6. Step 6: Final answer
    x = 20,934.15

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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.