Home / 15,631.45-21,571.14-8,557.72

Finding the Fourth Proportional to 15,631.45, 21,571.14 and 8,557.72

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Solution

The fourth proportional to 15,631.45, 21,571.14 and 8,557.72 is: 11,809.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,631.45 : 21,571.14 = 8,557.72 : x
  2. Step 2: Convert to fraction form
    15,631.45/21,571.14 = 8,557.72/x
  3. Step 3: Cross multiply
    15,631.45x = 21,571.14 × 8,557.72
  4. Step 4: Simplify right side
    15,631.45x = 184,599,754.36
  5. Step 5: Solve for x
    x = 184,599,754.36/15,631.45
  6. Step 6: Final answer
    x = 11,809.51

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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.