Home / 15,890.78-21,930.27-9,177.64

Finding the Fourth Proportional to 15,890.78, 21,930.27 and 9,177.64

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Solution

The fourth proportional to 15,890.78, 21,930.27 and 9,177.64 is: 12,665.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,890.78 : 21,930.27 = 9,177.64 : x
  2. Step 2: Convert to fraction form
    15,890.78/21,930.27 = 9,177.64/x
  3. Step 3: Cross multiply
    15,890.78x = 21,930.27 × 9,177.64
  4. Step 4: Simplify right side
    15,890.78x = 201,268,123.16
  5. Step 5: Solve for x
    x = 201,268,123.16/15,890.78
  6. Step 6: Final answer
    x = 12,665.72

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.