Home / 7,811.88-10,780.35-4,275.09

Finding the Fourth Proportional to 7,811.88, 10,780.35 and 4,275.09

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Solution

The fourth proportional to 7,811.88, 10,780.35 and 4,275.09 is: 5,899.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,811.88 : 10,780.35 = 4,275.09 : x
  2. Step 2: Convert to fraction form
    7,811.88/10,780.35 = 4,275.09/x
  3. Step 3: Cross multiply
    7,811.88x = 10,780.35 × 4,275.09
  4. Step 4: Simplify right side
    7,811.88x = 46,086,966.48
  5. Step 5: Solve for x
    x = 46,086,966.48/7,811.88
  6. Step 6: Final answer
    x = 5,899.60

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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.