Home / 20,312-28,033.80-11,926.88

Finding the Fourth Proportional to 20,312, 28,033.80 and 11,926.88

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Solution

The fourth proportional to 20,312, 28,033.80 and 11,926.88 is: 16,461.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,312 : 28,033.80 = 11,926.88 : x
  2. Step 2: Convert to fraction form
    20,312/28,033.80 = 11,926.88/x
  3. Step 3: Cross multiply
    20,312x = 28,033.80 × 11,926.88
  4. Step 4: Simplify right side
    20,312x = 334,355,768.54
  5. Step 5: Solve for x
    x = 334,355,768.54/20,312
  6. Step 6: Final answer
    x = 16,461.00

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.