Home / 15,631.38-21,571.20-8,557.92

Finding the Fourth Proportional to 15,631.38, 21,571.20 and 8,557.92

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Solution

The fourth proportional to 15,631.38, 21,571.20 and 8,557.92 is: 11,809.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,631.38 : 21,571.20 = 8,557.92 : x
  2. Step 2: Convert to fraction form
    15,631.38/21,571.20 = 8,557.92/x
  3. Step 3: Cross multiply
    15,631.38x = 21,571.20 × 8,557.92
  4. Step 4: Simplify right side
    15,631.38x = 184,604,603.90
  5. Step 5: Solve for x
    x = 184,604,603.90/15,631.38
  6. Step 6: Final answer
    x = 11,809.87

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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.