Home / 5,681.43-8,521.74-1,785.78

Finding the Fourth Proportional to 5,681.43, 8,521.74 and 1,785.78

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Solution

The fourth proportional to 5,681.43, 8,521.74 and 1,785.78 is: 2,678.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,681.43 : 8,521.74 = 1,785.78 : x
  2. Step 2: Convert to fraction form
    5,681.43/8,521.74 = 1,785.78/x
  3. Step 3: Cross multiply
    5,681.43x = 8,521.74 × 1,785.78
  4. Step 4: Simplify right side
    5,681.43x = 15,217,952.86
  5. Step 5: Solve for x
    x = 15,217,952.86/5,681.43
  6. Step 6: Final answer
    x = 2,678.54

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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.