Home / 15,693.12-21,655.44-8,619.84

Finding the Fourth Proportional to 15,693.12, 21,655.44 and 8,619.84

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Solution

The fourth proportional to 15,693.12, 21,655.44 and 8,619.84 is: 11,894.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,693.12 : 21,655.44 = 8,619.84 : x
  2. Step 2: Convert to fraction form
    15,693.12/21,655.44 = 8,619.84/x
  3. Step 3: Cross multiply
    15,693.12x = 21,655.44 × 8,619.84
  4. Step 4: Simplify right side
    15,693.12x = 186,666,427.93
  5. Step 5: Solve for x
    x = 186,666,427.93/15,693.12
  6. Step 6: Final answer
    x = 11,894.79

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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.