Home / 20,725.65-31,088.43-5,143.23

Finding the Fourth Proportional to 20,725.65, 31,088.43 and 5,143.23

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Solution

The fourth proportional to 20,725.65, 31,088.43 and 5,143.23 is: 7,714.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,725.65 : 31,088.43 = 5,143.23 : x
  2. Step 2: Convert to fraction form
    20,725.65/31,088.43 = 5,143.23/x
  3. Step 3: Cross multiply
    20,725.65x = 31,088.43 × 5,143.23
  4. Step 4: Simplify right side
    20,725.65x = 159,894,945.83
  5. Step 5: Solve for x
    x = 159,894,945.83/20,725.65
  6. Step 6: Final answer
    x = 7,714.83

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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.