Home / 7,929.40-10,939.14-4,783.78

Finding the Fourth Proportional to 7,929.40, 10,939.14 and 4,783.78

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Solution

The fourth proportional to 7,929.40, 10,939.14 and 4,783.78 is: 6,599.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,929.40 : 10,939.14 = 4,783.78 : x
  2. Step 2: Convert to fraction form
    7,929.40/10,939.14 = 4,783.78/x
  3. Step 3: Cross multiply
    7,929.40x = 10,939.14 × 4,783.78
  4. Step 4: Simplify right side
    7,929.40x = 52,330,439.15
  5. Step 5: Solve for x
    x = 52,330,439.15/7,929.40
  6. Step 6: Final answer
    x = 6,599.55

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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.