Home / 20,869.29-31,300.61-7,718.67

Finding the Fourth Proportional to 20,869.29, 31,300.61 and 7,718.67

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Solution

The fourth proportional to 20,869.29, 31,300.61 and 7,718.67 is: 11,576.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,869.29 : 31,300.61 = 7,718.67 : x
  2. Step 2: Convert to fraction form
    20,869.29/31,300.61 = 7,718.67/x
  3. Step 3: Cross multiply
    20,869.29x = 31,300.61 × 7,718.67
  4. Step 4: Simplify right side
    20,869.29x = 241,599,040.80
  5. Step 5: Solve for x
    x = 241,599,040.80/20,869.29
  6. Step 6: Final answer
    x = 11,576.77

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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.