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Finding the Fourth Proportional to 11,172.68, 15,425.51 and 6,928.25

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Solution

The fourth proportional to 11,172.68, 15,425.51 and 6,928.25 is: 9,565.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,172.68 : 15,425.51 = 6,928.25 : x
  2. Step 2: Convert to fraction form
    11,172.68/15,425.51 = 6,928.25/x
  3. Step 3: Cross multiply
    11,172.68x = 15,425.51 × 6,928.25
  4. Step 4: Simplify right side
    11,172.68x = 106,871,677.89
  5. Step 5: Solve for x
    x = 106,871,677.89/11,172.68
  6. Step 6: Final answer
    x = 9,565.45

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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.