Home / 3,881.40-5,818.38-1,931.70

Finding the Fourth Proportional to 3,881.40, 5,818.38 and 1,931.70

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Solution

The fourth proportional to 3,881.40, 5,818.38 and 1,931.70 is: 2,895.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,881.40 : 5,818.38 = 1,931.70 : x
  2. Step 2: Convert to fraction form
    3,881.40/5,818.38 = 1,931.70/x
  3. Step 3: Cross multiply
    3,881.40x = 5,818.38 × 1,931.70
  4. Step 4: Simplify right side
    3,881.40x = 11,239,364.65
  5. Step 5: Solve for x
    x = 11,239,364.65/3,881.40
  6. Step 6: Final answer
    x = 2,895.70

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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.