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Finding the Fourth Proportional to 21,647.53, 29,881.53 and 12,702.53

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Solution

The fourth proportional to 21,647.53, 29,881.53 and 12,702.53 is: 17,534.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,647.53 : 29,881.53 = 12,702.53 : x
  2. Step 2: Convert to fraction form
    21,647.53/29,881.53 = 12,702.53/x
  3. Step 3: Cross multiply
    21,647.53x = 29,881.53 × 12,702.53
  4. Step 4: Simplify right side
    21,647.53x = 379,571,031.27
  5. Step 5: Solve for x
    x = 379,571,031.27/21,647.53
  6. Step 6: Final answer
    x = 17,534.15

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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.