Home / 21,187.19-31,768.42-6,391.67

Finding the Fourth Proportional to 21,187.19, 31,768.42 and 6,391.67

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Solution

The fourth proportional to 21,187.19, 31,768.42 and 6,391.67 is: 9,583.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,187.19 : 31,768.42 = 6,391.67 : x
  2. Step 2: Convert to fraction form
    21,187.19/31,768.42 = 6,391.67/x
  3. Step 3: Cross multiply
    21,187.19x = 31,768.42 × 6,391.67
  4. Step 4: Simplify right side
    21,187.19x = 203,053,082.24
  5. Step 5: Solve for x
    x = 203,053,082.24/21,187.19
  6. Step 6: Final answer
    x = 9,583.77

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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.