Home / 21,185.40-31,771.10-7,141.64

Finding the Fourth Proportional to 21,185.40, 31,771.10 and 7,141.64

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Solution

The fourth proportional to 21,185.40, 31,771.10 and 7,141.64 is: 10,710.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,185.40 : 31,771.10 = 7,141.64 : x
  2. Step 2: Convert to fraction form
    21,185.40/31,771.10 = 7,141.64/x
  3. Step 3: Cross multiply
    21,185.40x = 31,771.10 × 7,141.64
  4. Step 4: Simplify right side
    21,185.40x = 226,897,758.60
  5. Step 5: Solve for x
    x = 226,897,758.60/21,185.40
  6. Step 6: Final answer
    x = 10,710.10

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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.