Home / 12,931.70-19,397.55-3,571.80

Finding the Fourth Proportional to 12,931.70, 19,397.55 and 3,571.80

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Solution

The fourth proportional to 12,931.70, 19,397.55 and 3,571.80 is: 5,357.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,931.70 : 19,397.55 = 3,571.80 : x
  2. Step 2: Convert to fraction form
    12,931.70/19,397.55 = 3,571.80/x
  3. Step 3: Cross multiply
    12,931.70x = 19,397.55 × 3,571.80
  4. Step 4: Simplify right side
    12,931.70x = 69,284,169.09
  5. Step 5: Solve for x
    x = 69,284,169.09/12,931.70
  6. Step 6: Final answer
    x = 5,357.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.