Home / 9,872.81-13,615.64-8,191.55

Finding the Fourth Proportional to 9,872.81, 13,615.64 and 8,191.55

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Solution

The fourth proportional to 9,872.81, 13,615.64 and 8,191.55 is: 11,297.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,872.81 : 13,615.64 = 8,191.55 : x
  2. Step 2: Convert to fraction form
    9,872.81/13,615.64 = 8,191.55/x
  3. Step 3: Cross multiply
    9,872.81x = 13,615.64 × 8,191.55
  4. Step 4: Simplify right side
    9,872.81x = 111,533,086.81
  5. Step 5: Solve for x
    x = 111,533,086.81/9,872.81
  6. Step 6: Final answer
    x = 11,297.00

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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.