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Finding the Fourth Proportional to 9,322.76, 12,865.16 and 5,131.02

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Solution

The fourth proportional to 9,322.76, 12,865.16 and 5,131.02 is: 7,080.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,322.76 : 12,865.16 = 5,131.02 : x
  2. Step 2: Convert to fraction form
    9,322.76/12,865.16 = 5,131.02/x
  3. Step 3: Cross multiply
    9,322.76x = 12,865.16 × 5,131.02
  4. Step 4: Simplify right side
    9,322.76x = 66,011,393.26
  5. Step 5: Solve for x
    x = 66,011,393.26/9,322.76
  6. Step 6: Final answer
    x = 7,080.67

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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.