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Finding the Fourth Proportional to 21,719.99, 32,589.32 and 8,402.32

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Solution

The fourth proportional to 21,719.99, 32,589.32 and 8,402.32 is: 12,607.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,719.99 : 32,589.32 = 8,402.32 : x
  2. Step 2: Convert to fraction form
    21,719.99/32,589.32 = 8,402.32/x
  3. Step 3: Cross multiply
    21,719.99x = 32,589.32 × 8,402.32
  4. Step 4: Simplify right side
    21,719.99x = 273,825,980.77
  5. Step 5: Solve for x
    x = 273,825,980.77/21,719.99
  6. Step 6: Final answer
    x = 12,607.10

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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.