Home / 21,177.36-31,768.96-7,141.40

Finding the Fourth Proportional to 21,177.36, 31,768.96 and 7,141.40

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Solution

The fourth proportional to 21,177.36, 31,768.96 and 7,141.40 is: 10,713.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,177.36 : 31,768.96 = 7,141.40 : x
  2. Step 2: Convert to fraction form
    21,177.36/31,768.96 = 7,141.40/x
  3. Step 3: Cross multiply
    21,177.36x = 31,768.96 × 7,141.40
  4. Step 4: Simplify right side
    21,177.36x = 226,874,692.10
  5. Step 5: Solve for x
    x = 226,874,692.10/21,177.36
  6. Step 6: Final answer
    x = 10,713.08

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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.