Home / 21,237.28-31,861.68-6,446.68

Finding the Fourth Proportional to 21,237.28, 31,861.68 and 6,446.68

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Solution

The fourth proportional to 21,237.28, 31,861.68 and 6,446.68 is: 9,671.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,237.28 : 31,861.68 = 6,446.68 : x
  2. Step 2: Convert to fraction form
    21,237.28/31,861.68 = 6,446.68/x
  3. Step 3: Cross multiply
    21,237.28x = 31,861.68 × 6,446.68
  4. Step 4: Simplify right side
    21,237.28x = 205,402,055.22
  5. Step 5: Solve for x
    x = 205,402,055.22/21,237.28
  6. Step 6: Final answer
    x = 9,671.77

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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.