Home / 12,930.78-19,386.29-5,905.91

Finding the Fourth Proportional to 12,930.78, 19,386.29 and 5,905.91

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Solution

The fourth proportional to 12,930.78, 19,386.29 and 5,905.91 is: 8,854.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,930.78 : 19,386.29 = 5,905.91 : x
  2. Step 2: Convert to fraction form
    12,930.78/19,386.29 = 5,905.91/x
  3. Step 3: Cross multiply
    12,930.78x = 19,386.29 × 5,905.91
  4. Step 4: Simplify right side
    12,930.78x = 114,493,683.97
  5. Step 5: Solve for x
    x = 114,493,683.97/12,930.78
  6. Step 6: Final answer
    x = 8,854.35

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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.