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Finding the Fourth Proportional to 39,302.99, 54,239.10 and 21,398.98

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Solution

The fourth proportional to 39,302.99, 54,239.10 and 21,398.98 is: 29,531.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,302.99 : 54,239.10 = 21,398.98 : x
  2. Step 2: Convert to fraction form
    39,302.99/54,239.10 = 21,398.98/x
  3. Step 3: Cross multiply
    39,302.99x = 54,239.10 × 21,398.98
  4. Step 4: Simplify right side
    39,302.99x = 1,160,661,416.12
  5. Step 5: Solve for x
    x = 1,160,661,416.12/39,302.99
  6. Step 6: Final answer
    x = 29,531.12

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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.