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Finding the Fourth Proportional to 19,703.75, 27,191.15 and 12,630.15

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Solution

The fourth proportional to 19,703.75, 27,191.15 and 12,630.15 is: 17,429.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,703.75 : 27,191.15 = 12,630.15 : x
  2. Step 2: Convert to fraction form
    19,703.75/27,191.15 = 12,630.15/x
  3. Step 3: Cross multiply
    19,703.75x = 27,191.15 × 12,630.15
  4. Step 4: Simplify right side
    19,703.75x = 343,428,240.02
  5. Step 5: Solve for x
    x = 343,428,240.02/19,703.75
  6. Step 6: Final answer
    x = 17,429.59

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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.