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Finding the Fourth Proportional to 15,777.20, 23,665.80 and 15,009.20

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Solution

The fourth proportional to 15,777.20, 23,665.80 and 15,009.20 is: 22,513.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,777.20 : 23,665.80 = 15,009.20 : x
  2. Step 2: Convert to fraction form
    15,777.20/23,665.80 = 15,009.20/x
  3. Step 3: Cross multiply
    15,777.20x = 23,665.80 × 15,009.20
  4. Step 4: Simplify right side
    15,777.20x = 355,204,725.36
  5. Step 5: Solve for x
    x = 355,204,725.36/15,777.20
  6. Step 6: Final answer
    x = 22,513.80

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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.