Home / 15,721.28-23,564.90-7,930.70

Finding the Fourth Proportional to 15,721.28, 23,564.90 and 7,930.70

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Solution

The fourth proportional to 15,721.28, 23,564.90 and 7,930.70 is: 11,887.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,721.28 : 23,564.90 = 7,930.70 : x
  2. Step 2: Convert to fraction form
    15,721.28/23,564.90 = 7,930.70/x
  3. Step 3: Cross multiply
    15,721.28x = 23,564.90 × 7,930.70
  4. Step 4: Simplify right side
    15,721.28x = 186,886,152.43
  5. Step 5: Solve for x
    x = 186,886,152.43/15,721.28
  6. Step 6: Final answer
    x = 11,887.46

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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.