Home / 9,869.85-13,618.89-5,890.91

Finding the Fourth Proportional to 9,869.85, 13,618.89 and 5,890.91

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Solution

The fourth proportional to 9,869.85, 13,618.89 and 5,890.91 is: 8,128.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,869.85 : 13,618.89 = 5,890.91 : x
  2. Step 2: Convert to fraction form
    9,869.85/13,618.89 = 5,890.91/x
  3. Step 3: Cross multiply
    9,869.85x = 13,618.89 × 5,890.91
  4. Step 4: Simplify right side
    9,869.85x = 80,227,587.20
  5. Step 5: Solve for x
    x = 80,227,587.20/9,869.85
  6. Step 6: Final answer
    x = 8,128.55

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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.