Home / 12,689.79-19,036.49-3,925.38

Finding the Fourth Proportional to 12,689.79, 19,036.49 and 3,925.38

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Solution

The fourth proportional to 12,689.79, 19,036.49 and 3,925.38 is: 5,888.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,689.79 : 19,036.49 = 3,925.38 : x
  2. Step 2: Convert to fraction form
    12,689.79/19,036.49 = 3,925.38/x
  3. Step 3: Cross multiply
    12,689.79x = 19,036.49 × 3,925.38
  4. Step 4: Simplify right side
    12,689.79x = 74,725,457.12
  5. Step 5: Solve for x
    x = 74,725,457.12/12,689.79
  6. Step 6: Final answer
    x = 5,888.63

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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.