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Finding the Fourth Proportional to 21,603.98, 29,812.25 and 12,043.55

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Solution

The fourth proportional to 21,603.98, 29,812.25 and 12,043.55 is: 16,619.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,603.98 : 29,812.25 = 12,043.55 : x
  2. Step 2: Convert to fraction form
    21,603.98/29,812.25 = 12,043.55/x
  3. Step 3: Cross multiply
    21,603.98x = 29,812.25 × 12,043.55
  4. Step 4: Simplify right side
    21,603.98x = 359,045,428.13
  5. Step 5: Solve for x
    x = 359,045,428.13/21,603.98
  6. Step 6: Final answer
    x = 16,619.41

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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.