Home / 15,905.36-21,950.14-9,191.88

Finding the Fourth Proportional to 15,905.36, 21,950.14 and 9,191.88

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Solution

The fourth proportional to 15,905.36, 21,950.14 and 9,191.88 is: 12,685.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,905.36 : 21,950.14 = 9,191.88 : x
  2. Step 2: Convert to fraction form
    15,905.36/21,950.14 = 9,191.88/x
  3. Step 3: Cross multiply
    15,905.36x = 21,950.14 × 9,191.88
  4. Step 4: Simplify right side
    15,905.36x = 201,763,052.86
  5. Step 5: Solve for x
    x = 201,763,052.86/15,905.36
  6. Step 6: Final answer
    x = 12,685.22

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.