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Finding the Fourth Proportional to 7,478.92, 10,333.74 and 5,918.86

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Solution

The fourth proportional to 7,478.92, 10,333.74 and 5,918.86 is: 8,178.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,478.92 : 10,333.74 = 5,918.86 : x
  2. Step 2: Convert to fraction form
    7,478.92/10,333.74 = 5,918.86/x
  3. Step 3: Cross multiply
    7,478.92x = 10,333.74 × 5,918.86
  4. Step 4: Simplify right side
    7,478.92x = 61,163,960.34
  5. Step 5: Solve for x
    x = 61,163,960.34/7,478.92
  6. Step 6: Final answer
    x = 8,178.18

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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.