Home / 21,121.60-29,148.73-11,690.16

Finding the Fourth Proportional to 21,121.60, 29,148.73 and 11,690.16

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Solution

The fourth proportional to 21,121.60, 29,148.73 and 11,690.16 is: 16,132.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,121.60 : 29,148.73 = 11,690.16 : x
  2. Step 2: Convert to fraction form
    21,121.60/29,148.73 = 11,690.16/x
  3. Step 3: Cross multiply
    21,121.60x = 29,148.73 × 11,690.16
  4. Step 4: Simplify right side
    21,121.60x = 340,753,186.17
  5. Step 5: Solve for x
    x = 340,753,186.17/21,121.60
  6. Step 6: Final answer
    x = 16,132.93

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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.