Home / 20,818.03-31,231.65-9,718.66

Finding the Fourth Proportional to 20,818.03, 31,231.65 and 9,718.66

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Solution

The fourth proportional to 20,818.03, 31,231.65 and 9,718.66 is: 14,580.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,818.03 : 31,231.65 = 9,718.66 : x
  2. Step 2: Convert to fraction form
    20,818.03/31,231.65 = 9,718.66/x
  3. Step 3: Cross multiply
    20,818.03x = 31,231.65 × 9,718.66
  4. Step 4: Simplify right side
    20,818.03x = 303,529,787.59
  5. Step 5: Solve for x
    x = 303,529,787.59/20,818.03
  6. Step 6: Final answer
    x = 14,580.14

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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.