Home / 20,877.30-31,317.06-10,200.42

Finding the Fourth Proportional to 20,877.30, 31,317.06 and 10,200.42

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Solution

The fourth proportional to 20,877.30, 31,317.06 and 10,200.42 is: 15,301.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,877.30 : 31,317.06 = 10,200.42 : x
  2. Step 2: Convert to fraction form
    20,877.30/31,317.06 = 10,200.42/x
  3. Step 3: Cross multiply
    20,877.30x = 31,317.06 × 10,200.42
  4. Step 4: Simplify right side
    20,877.30x = 319,447,165.17
  5. Step 5: Solve for x
    x = 319,447,165.17/20,877.30
  6. Step 6: Final answer
    x = 15,301.17

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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.