Home / 28,566.80-42,850.20-11,921.30

Finding the Fourth Proportional to 28,566.80, 42,850.20 and 11,921.30

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Solution

The fourth proportional to 28,566.80, 42,850.20 and 11,921.30 is: 17,881.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,566.80 : 42,850.20 = 11,921.30 : x
  2. Step 2: Convert to fraction form
    28,566.80/42,850.20 = 11,921.30/x
  3. Step 3: Cross multiply
    28,566.80x = 42,850.20 × 11,921.30
  4. Step 4: Simplify right side
    28,566.80x = 510,830,089.26
  5. Step 5: Solve for x
    x = 510,830,089.26/28,566.80
  6. Step 6: Final answer
    x = 17,881.95

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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.