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Finding the Fourth Proportional to 21,606.66, 32,409.99 and 5,190.66

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Solution

The fourth proportional to 21,606.66, 32,409.99 and 5,190.66 is: 7,785.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,606.66 : 32,409.99 = 5,190.66 : x
  2. Step 2: Convert to fraction form
    21,606.66/32,409.99 = 5,190.66/x
  3. Step 3: Cross multiply
    21,606.66x = 32,409.99 × 5,190.66
  4. Step 4: Simplify right side
    21,606.66x = 168,229,050.69
  5. Step 5: Solve for x
    x = 168,229,050.69/21,606.66
  6. Step 6: Final answer
    x = 7,785.98

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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.