Home / 15,693.20-21,656.75-8,619.78

Finding the Fourth Proportional to 15,693.20, 21,656.75 and 8,619.78

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Solution

The fourth proportional to 15,693.20, 21,656.75 and 8,619.78 is: 11,895.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,693.20 : 21,656.75 = 8,619.78 : x
  2. Step 2: Convert to fraction form
    15,693.20/21,656.75 = 8,619.78/x
  3. Step 3: Cross multiply
    15,693.20x = 21,656.75 × 8,619.78
  4. Step 4: Simplify right side
    15,693.20x = 186,676,377.42
  5. Step 5: Solve for x
    x = 186,676,377.42/15,693.20
  6. Step 6: Final answer
    x = 11,895.37

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1.5x scale

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.