Home / 20,736.20-31,070.10-11,955.80

Finding the Fourth Proportional to 20,736.20, 31,070.10 and 11,955.80

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Solution

The fourth proportional to 20,736.20, 31,070.10 and 11,955.80 is: 17,913.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,736.20 : 31,070.10 = 11,955.80 : x
  2. Step 2: Convert to fraction form
    20,736.20/31,070.10 = 11,955.80/x
  3. Step 3: Cross multiply
    20,736.20x = 31,070.10 × 11,955.80
  4. Step 4: Simplify right side
    20,736.20x = 371,467,901.58
  5. Step 5: Solve for x
    x = 371,467,901.58/20,736.20
  6. Step 6: Final answer
    x = 17,913.98

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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.