Home / 20,858.59-31,288.07-8,209.63

Finding the Fourth Proportional to 20,858.59, 31,288.07 and 8,209.63

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Solution

The fourth proportional to 20,858.59, 31,288.07 and 8,209.63 is: 12,314.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,858.59 : 31,288.07 = 8,209.63 : x
  2. Step 2: Convert to fraction form
    20,858.59/31,288.07 = 8,209.63/x
  3. Step 3: Cross multiply
    20,858.59x = 31,288.07 × 8,209.63
  4. Step 4: Simplify right side
    20,858.59x = 256,863,478.11
  5. Step 5: Solve for x
    x = 256,863,478.11/20,858.59
  6. Step 6: Final answer
    x = 12,314.52

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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.