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Finding the Fourth Proportional to 15,009.88, 20,721.54 and 9,346.36

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Solution

The fourth proportional to 15,009.88, 20,721.54 and 9,346.36 is: 12,902.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,009.88 : 20,721.54 = 9,346.36 : x
  2. Step 2: Convert to fraction form
    15,009.88/20,721.54 = 9,346.36/x
  3. Step 3: Cross multiply
    15,009.88x = 20,721.54 × 9,346.36
  4. Step 4: Simplify right side
    15,009.88x = 193,670,972.59
  5. Step 5: Solve for x
    x = 193,670,972.59/15,009.88
  6. Step 6: Final answer
    x = 12,902.90

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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.