Home / 20,725.92-31,088.58-5,143.54

Finding the Fourth Proportional to 20,725.92, 31,088.58 and 5,143.54

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Solution

The fourth proportional to 20,725.92, 31,088.58 and 5,143.54 is: 7,715.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,725.92 : 31,088.58 = 5,143.54 : x
  2. Step 2: Convert to fraction form
    20,725.92/31,088.58 = 5,143.54/x
  3. Step 3: Cross multiply
    20,725.92x = 31,088.58 × 5,143.54
  4. Step 4: Simplify right side
    20,725.92x = 159,905,354.77
  5. Step 5: Solve for x
    x = 159,905,354.77/20,725.92
  6. Step 6: Final answer
    x = 7,715.24

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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.