Home / 20,872.34-31,298.29-10,330.19

Finding the Fourth Proportional to 20,872.34, 31,298.29 and 10,330.19

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Solution

The fourth proportional to 20,872.34, 31,298.29 and 10,330.19 is: 15,490.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,872.34 : 31,298.29 = 10,330.19 : x
  2. Step 2: Convert to fraction form
    20,872.34/31,298.29 = 10,330.19/x
  3. Step 3: Cross multiply
    20,872.34x = 31,298.29 × 10,330.19
  4. Step 4: Simplify right side
    20,872.34x = 323,317,282.38
  5. Step 5: Solve for x
    x = 323,317,282.38/20,872.34
  6. Step 6: Final answer
    x = 15,490.23

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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.