Home / 20,956.12-31,358.85-15,395.67

Finding the Fourth Proportional to 20,956.12, 31,358.85 and 15,395.67

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Solution

The fourth proportional to 20,956.12, 31,358.85 and 15,395.67 is: 23,038.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,956.12 : 31,358.85 = 15,395.67 : x
  2. Step 2: Convert to fraction form
    20,956.12/31,358.85 = 15,395.67/x
  3. Step 3: Cross multiply
    20,956.12x = 31,358.85 × 15,395.67
  4. Step 4: Simplify right side
    20,956.12x = 482,790,448.45
  5. Step 5: Solve for x
    x = 482,790,448.45/20,956.12
  6. Step 6: Final answer
    x = 23,038.16

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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.