Home / 15,621.25-21,557.79-8,548.15

Finding the Fourth Proportional to 15,621.25, 21,557.79 and 8,548.15

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Solution

The fourth proportional to 15,621.25, 21,557.79 and 8,548.15 is: 11,796.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,621.25 : 21,557.79 = 8,548.15 : x
  2. Step 2: Convert to fraction form
    15,621.25/21,557.79 = 8,548.15/x
  3. Step 3: Cross multiply
    15,621.25x = 21,557.79 × 8,548.15
  4. Step 4: Simplify right side
    15,621.25x = 184,279,222.59
  5. Step 5: Solve for x
    x = 184,279,222.59/15,621.25
  6. Step 6: Final answer
    x = 11,796.70

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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.