Home / 21,317.85-31,818.89-20,004.57

Finding the Fourth Proportional to 21,317.85, 31,818.89 and 20,004.57

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Solution

The fourth proportional to 21,317.85, 31,818.89 and 20,004.57 is: 29,858.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,317.85 : 31,818.89 = 20,004.57 : x
  2. Step 2: Convert to fraction form
    21,317.85/31,818.89 = 20,004.57/x
  3. Step 3: Cross multiply
    21,317.85x = 31,818.89 × 20,004.57
  4. Step 4: Simplify right side
    21,317.85x = 636,523,262.34
  5. Step 5: Solve for x
    x = 636,523,262.34/21,317.85
  6. Step 6: Final answer
    x = 29,858.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.