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Finding the Fourth Proportional to 21,393.64, 32,089.65 and 5,811.67

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Solution

The fourth proportional to 21,393.64, 32,089.65 and 5,811.67 is: 8,717.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,393.64 : 32,089.65 = 5,811.67 : x
  2. Step 2: Convert to fraction form
    21,393.64/32,089.65 = 5,811.67/x
  3. Step 3: Cross multiply
    21,393.64x = 32,089.65 × 5,811.67
  4. Step 4: Simplify right side
    21,393.64x = 186,494,456.22
  5. Step 5: Solve for x
    x = 186,494,456.22/21,393.64
  6. Step 6: Final answer
    x = 8,717.28

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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.