Home / 20,938.25-31,407.12-6,146.63

Finding the Fourth Proportional to 20,938.25, 31,407.12 and 6,146.63

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Solution

The fourth proportional to 20,938.25, 31,407.12 and 6,146.63 is: 9,219.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,938.25 : 31,407.12 = 6,146.63 : x
  2. Step 2: Convert to fraction form
    20,938.25/31,407.12 = 6,146.63/x
  3. Step 3: Cross multiply
    20,938.25x = 31,407.12 × 6,146.63
  4. Step 4: Simplify right side
    20,938.25x = 193,048,066.12
  5. Step 5: Solve for x
    x = 193,048,066.12/20,938.25
  6. Step 6: Final answer
    x = 9,219.88

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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.