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Finding the Fourth Proportional to 9,928.21, 13,701.05 and 5,451.87

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Solution

The fourth proportional to 9,928.21, 13,701.05 and 5,451.87 is: 7,523.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,928.21 : 13,701.05 = 5,451.87 : x
  2. Step 2: Convert to fraction form
    9,928.21/13,701.05 = 5,451.87/x
  3. Step 3: Cross multiply
    9,928.21x = 13,701.05 × 5,451.87
  4. Step 4: Simplify right side
    9,928.21x = 74,696,343.46
  5. Step 5: Solve for x
    x = 74,696,343.46/9,928.21
  6. Step 6: Final answer
    x = 7,523.64

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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.