Home / 7,807.49-10,777.86-4,978.66

Finding the Fourth Proportional to 7,807.49, 10,777.86 and 4,978.66

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Solution

The fourth proportional to 7,807.49, 10,777.86 and 4,978.66 is: 6,872.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,807.49 : 10,777.86 = 4,978.66 : x
  2. Step 2: Convert to fraction form
    7,807.49/10,777.86 = 4,978.66/x
  3. Step 3: Cross multiply
    7,807.49x = 10,777.86 × 4,978.66
  4. Step 4: Simplify right side
    7,807.49x = 53,659,275.57
  5. Step 5: Solve for x
    x = 53,659,275.57/7,807.49
  6. Step 6: Final answer
    x = 6,872.79

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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.