Home / 21,117.45-31,683.22-7,078.87

Finding the Fourth Proportional to 21,117.45, 31,683.22 and 7,078.87

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Solution

The fourth proportional to 21,117.45, 31,683.22 and 7,078.87 is: 10,620.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,117.45 : 31,683.22 = 7,078.87 : x
  2. Step 2: Convert to fraction form
    21,117.45/31,683.22 = 7,078.87/x
  3. Step 3: Cross multiply
    21,117.45x = 31,683.22 × 7,078.87
  4. Step 4: Simplify right side
    21,117.45x = 224,281,417.47
  5. Step 5: Solve for x
    x = 224,281,417.47/21,117.45
  6. Step 6: Final answer
    x = 10,620.67

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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.