Home / 12,688.97-19,038.33-5,291.46

Finding the Fourth Proportional to 12,688.97, 19,038.33 and 5,291.46

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Solution

The fourth proportional to 12,688.97, 19,038.33 and 5,291.46 is: 7,939.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,688.97 : 19,038.33 = 5,291.46 : x
  2. Step 2: Convert to fraction form
    12,688.97/19,038.33 = 5,291.46/x
  3. Step 3: Cross multiply
    12,688.97x = 19,038.33 × 5,291.46
  4. Step 4: Simplify right side
    12,688.97x = 100,740,561.66
  5. Step 5: Solve for x
    x = 100,740,561.66/12,688.97
  6. Step 6: Final answer
    x = 7,939.23

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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.