Home / 20,961.94-31,432.80-9,859.24

Finding the Fourth Proportional to 20,961.94, 31,432.80 and 9,859.24

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Solution

The fourth proportional to 20,961.94, 31,432.80 and 9,859.24 is: 14,784.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,961.94 : 31,432.80 = 9,859.24 : x
  2. Step 2: Convert to fraction form
    20,961.94/31,432.80 = 9,859.24/x
  3. Step 3: Cross multiply
    20,961.94x = 31,432.80 × 9,859.24
  4. Step 4: Simplify right side
    20,961.94x = 309,903,519.07
  5. Step 5: Solve for x
    x = 309,903,519.07/20,961.94
  6. Step 6: Final answer
    x = 14,784.10

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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.