Home / 15,930.79-21,976.20-9,554.31

Finding the Fourth Proportional to 15,930.79, 21,976.20 and 9,554.31

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Solution

The fourth proportional to 15,930.79, 21,976.20 and 9,554.31 is: 13,179.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,930.79 : 21,976.20 = 9,554.31 : x
  2. Step 2: Convert to fraction form
    15,930.79/21,976.20 = 9,554.31/x
  3. Step 3: Cross multiply
    15,930.79x = 21,976.20 × 9,554.31
  4. Step 4: Simplify right side
    15,930.79x = 209,967,427.42
  5. Step 5: Solve for x
    x = 209,967,427.42/15,930.79
  6. Step 6: Final answer
    x = 13,179.98

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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.