Home / 21,103.11-31,659.35-7,955.60

Finding the Fourth Proportional to 21,103.11, 31,659.35 and 7,955.60

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Solution

The fourth proportional to 21,103.11, 31,659.35 and 7,955.60 is: 11,935.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,103.11 : 31,659.35 = 7,955.60 : x
  2. Step 2: Convert to fraction form
    21,103.11/31,659.35 = 7,955.60/x
  3. Step 3: Cross multiply
    21,103.11x = 31,659.35 × 7,955.60
  4. Step 4: Simplify right side
    21,103.11x = 251,868,926.79
  5. Step 5: Solve for x
    x = 251,868,926.79/21,103.11
  6. Step 6: Final answer
    x = 11,935.16

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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.