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Finding the Fourth Proportional to 7,956.39, 10,978.65 and 4,768.95

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Solution

The fourth proportional to 7,956.39, 10,978.65 and 4,768.95 is: 6,580.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,956.39 : 10,978.65 = 4,768.95 : x
  2. Step 2: Convert to fraction form
    7,956.39/10,978.65 = 4,768.95/x
  3. Step 3: Cross multiply
    7,956.39x = 10,978.65 × 4,768.95
  4. Step 4: Simplify right side
    7,956.39x = 52,356,632.92
  5. Step 5: Solve for x
    x = 52,356,632.92/7,956.39
  6. Step 6: Final answer
    x = 6,580.45

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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.