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Finding the Fourth Proportional to 30,985.74, 42,755.04 and 17,554.22

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Solution

The fourth proportional to 30,985.74, 42,755.04 and 17,554.22 is: 24,221.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,985.74 : 42,755.04 = 17,554.22 : x
  2. Step 2: Convert to fraction form
    30,985.74/42,755.04 = 17,554.22/x
  3. Step 3: Cross multiply
    30,985.74x = 42,755.04 × 17,554.22
  4. Step 4: Simplify right side
    30,985.74x = 750,531,324.83
  5. Step 5: Solve for x
    x = 750,531,324.83/30,985.74
  6. Step 6: Final answer
    x = 24,221.83

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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.