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Finding the Fourth Proportional to 12,700.71, 19,053.90 and 3,935.70

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Solution

The fourth proportional to 12,700.71, 19,053.90 and 3,935.70 is: 5,904.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,700.71 : 19,053.90 = 3,935.70 : x
  2. Step 2: Convert to fraction form
    12,700.71/19,053.90 = 3,935.70/x
  3. Step 3: Cross multiply
    12,700.71x = 19,053.90 × 3,935.70
  4. Step 4: Simplify right side
    12,700.71x = 74,990,434.23
  5. Step 5: Solve for x
    x = 74,990,434.23/12,700.71
  6. Step 6: Final answer
    x = 5,904.43

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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.