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Finding the Fourth Proportional to 12,955.71, 19,436.09 and 5,057.91

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Solution

The fourth proportional to 12,955.71, 19,436.09 and 5,057.91 is: 7,587.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,955.71 : 19,436.09 = 5,057.91 : x
  2. Step 2: Convert to fraction form
    12,955.71/19,436.09 = 5,057.91/x
  3. Step 3: Cross multiply
    12,955.71x = 19,436.09 × 5,057.91
  4. Step 4: Simplify right side
    12,955.71x = 98,305,968.68
  5. Step 5: Solve for x
    x = 98,305,968.68/12,955.71
  6. Step 6: Final answer
    x = 7,587.85

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.