Home / 15,690.04-21,661.31-11,906.59

Finding the Fourth Proportional to 15,690.04, 21,661.31 and 11,906.59

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Solution

The fourth proportional to 15,690.04, 21,661.31 and 11,906.59 is: 16,437.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,690.04 : 21,661.31 = 11,906.59 : x
  2. Step 2: Convert to fraction form
    15,690.04/21,661.31 = 11,906.59/x
  3. Step 3: Cross multiply
    15,690.04x = 21,661.31 × 11,906.59
  4. Step 4: Simplify right side
    15,690.04x = 257,912,223.35
  5. Step 5: Solve for x
    x = 257,912,223.35/15,690.04
  6. Step 6: Final answer
    x = 16,437.96

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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.