Home / 7,811.94-10,780.47-4,275.15

Finding the Fourth Proportional to 7,811.94, 10,780.47 and 4,275.15

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Solution

The fourth proportional to 7,811.94, 10,780.47 and 4,275.15 is: 5,899.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,811.94 : 10,780.47 = 4,275.15 : x
  2. Step 2: Convert to fraction form
    7,811.94/10,780.47 = 4,275.15/x
  3. Step 3: Cross multiply
    7,811.94x = 10,780.47 × 4,275.15
  4. Step 4: Simplify right side
    7,811.94x = 46,088,126.32
  5. Step 5: Solve for x
    x = 46,088,126.32/7,811.94
  6. Step 6: Final answer
    x = 5,899.70

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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.