Home / 3,131.95-4,322.15-1,715.70

Finding the Fourth Proportional to 3,131.95, 4,322.15 and 1,715.70

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Solution

The fourth proportional to 3,131.95, 4,322.15 and 1,715.70 is: 2,367.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,131.95 : 4,322.15 = 1,715.70 : x
  2. Step 2: Convert to fraction form
    3,131.95/4,322.15 = 1,715.70/x
  3. Step 3: Cross multiply
    3,131.95x = 4,322.15 × 1,715.70
  4. Step 4: Simplify right side
    3,131.95x = 7,415,491.14
  5. Step 5: Solve for x
    x = 7,415,491.14/3,131.95
  6. Step 6: Final answer
    x = 2,367.70

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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.