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Finding the Fourth Proportional to 21,294.51, 29,370.78 and 13,737.00

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Solution

The fourth proportional to 21,294.51, 29,370.78 and 13,737.00 is: 18,946.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,294.51 : 29,370.78 = 13,737.00 : x
  2. Step 2: Convert to fraction form
    21,294.51/29,370.78 = 13,737.00/x
  3. Step 3: Cross multiply
    21,294.51x = 29,370.78 × 13,737.00
  4. Step 4: Simplify right side
    21,294.51x = 403,466,515.00
  5. Step 5: Solve for x
    x = 403,466,515.00/21,294.51
  6. Step 6: Final answer
    x = 18,946.98

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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.