Home / 20,818.77-31,225.32-8,345.99

Finding the Fourth Proportional to 20,818.77, 31,225.32 and 8,345.99

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Solution

The fourth proportional to 20,818.77, 31,225.32 and 8,345.99 is: 12,517.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,818.77 : 31,225.32 = 8,345.99 : x
  2. Step 2: Convert to fraction form
    20,818.77/31,225.32 = 8,345.99/x
  3. Step 3: Cross multiply
    20,818.77x = 31,225.32 × 8,345.99
  4. Step 4: Simplify right side
    20,818.77x = 260,606,052.34
  5. Step 5: Solve for x
    x = 260,606,052.34/20,818.77
  6. Step 6: Final answer
    x = 12,517.84

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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.