Home / 21,189.72-31,776.93-6,394.08

Finding the Fourth Proportional to 21,189.72, 31,776.93 and 6,394.08

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Solution

The fourth proportional to 21,189.72, 31,776.93 and 6,394.08 is: 9,588.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,189.72 : 31,776.93 = 6,394.08 : x
  2. Step 2: Convert to fraction form
    21,189.72/31,776.93 = 6,394.08/x
  3. Step 3: Cross multiply
    21,189.72x = 31,776.93 × 6,394.08
  4. Step 4: Simplify right side
    21,189.72x = 203,184,232.57
  5. Step 5: Solve for x
    x = 203,184,232.57/21,189.72
  6. Step 6: Final answer
    x = 9,588.81

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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.