Home / 21,122.92-31,688.70-7,081.30

Finding the Fourth Proportional to 21,122.92, 31,688.70 and 7,081.30

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Solution

The fourth proportional to 21,122.92, 31,688.70 and 7,081.30 is: 10,623.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,122.92 : 31,688.70 = 7,081.30 : x
  2. Step 2: Convert to fraction form
    21,122.92/31,688.70 = 7,081.30/x
  3. Step 3: Cross multiply
    21,122.92x = 31,688.70 × 7,081.30
  4. Step 4: Simplify right side
    21,122.92x = 224,397,191.31
  5. Step 5: Solve for x
    x = 224,397,191.31/21,122.92
  6. Step 6: Final answer
    x = 10,623.40

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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.