Home / 20,961.42-31,432.08-9,858.74

Finding the Fourth Proportional to 20,961.42, 31,432.08 and 9,858.74

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Solution

The fourth proportional to 20,961.42, 31,432.08 and 9,858.74 is: 14,783.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,961.42 : 31,432.08 = 9,858.74 : x
  2. Step 2: Convert to fraction form
    20,961.42/31,432.08 = 9,858.74/x
  3. Step 3: Cross multiply
    20,961.42x = 31,432.08 × 9,858.74
  4. Step 4: Simplify right side
    20,961.42x = 309,880,704.38
  5. Step 5: Solve for x
    x = 309,880,704.38/20,961.42
  6. Step 6: Final answer
    x = 14,783.38

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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.