Home / 21,055.26-31,558.28-11,690.80

Finding the Fourth Proportional to 21,055.26, 31,558.28 and 11,690.80

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Solution

The fourth proportional to 21,055.26, 31,558.28 and 11,690.80 is: 17,522.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,055.26 : 31,558.28 = 11,690.80 : x
  2. Step 2: Convert to fraction form
    21,055.26/31,558.28 = 11,690.80/x
  3. Step 3: Cross multiply
    21,055.26x = 31,558.28 × 11,690.80
  4. Step 4: Simplify right side
    21,055.26x = 368,941,539.82
  5. Step 5: Solve for x
    x = 368,941,539.82/21,055.26
  6. Step 6: Final answer
    x = 17,522.54

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.