Home / 21,120.93-29,148.36-11,690.10

Finding the Fourth Proportional to 21,120.93, 29,148.36 and 11,690.10

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Solution

The fourth proportional to 21,120.93, 29,148.36 and 11,690.10 is: 16,133.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,120.93 : 29,148.36 = 11,690.10 : x
  2. Step 2: Convert to fraction form
    21,120.93/29,148.36 = 11,690.10/x
  3. Step 3: Cross multiply
    21,120.93x = 29,148.36 × 11,690.10
  4. Step 4: Simplify right side
    21,120.93x = 340,747,243.24
  5. Step 5: Solve for x
    x = 340,747,243.24/21,120.93
  6. Step 6: Final answer
    x = 16,133.16

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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.