Home / 21,492.92-31,979.34-20,957.24

Finding the Fourth Proportional to 21,492.92, 31,979.34 and 20,957.24

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Solution

The fourth proportional to 21,492.92, 31,979.34 and 20,957.24 is: 31,182.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,492.92 : 31,979.34 = 20,957.24 : x
  2. Step 2: Convert to fraction form
    21,492.92/31,979.34 = 20,957.24/x
  3. Step 3: Cross multiply
    21,492.92x = 31,979.34 × 20,957.24
  4. Step 4: Simplify right side
    21,492.92x = 670,198,703.42
  5. Step 5: Solve for x
    x = 670,198,703.42/21,492.92
  6. Step 6: Final answer
    x = 31,182.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.