Home / 21,326.56-31,947-10,620.66

Finding the Fourth Proportional to 21,326.56, 31,947 and 10,620.66

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Solution

The fourth proportional to 21,326.56, 31,947 and 10,620.66 is: 15,909.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,326.56 : 31,947 = 10,620.66 : x
  2. Step 2: Convert to fraction form
    21,326.56/31,947 = 10,620.66/x
  3. Step 3: Cross multiply
    21,326.56x = 31,947 × 10,620.66
  4. Step 4: Simplify right side
    21,326.56x = 339,298,225.02
  5. Step 5: Solve for x
    x = 339,298,225.02/21,326.56
  6. Step 6: Final answer
    x = 15,909.66

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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.