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Finding the Fourth Proportional to 7,867.50, 10,856.88 and 4,330.50

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Solution

The fourth proportional to 7,867.50, 10,856.88 and 4,330.50 is: 5,975.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,867.50 : 10,856.88 = 4,330.50 : x
  2. Step 2: Convert to fraction form
    7,867.50/10,856.88 = 4,330.50/x
  3. Step 3: Cross multiply
    7,867.50x = 10,856.88 × 4,330.50
  4. Step 4: Simplify right side
    7,867.50x = 47,015,718.84
  5. Step 5: Solve for x
    x = 47,015,718.84/7,867.50
  6. Step 6: Final answer
    x = 5,975.94

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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.