Home / 9,890.20-13,643.80-6,112.05

Finding the Fourth Proportional to 9,890.20, 13,643.80 and 6,112.05

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Solution

The fourth proportional to 9,890.20, 13,643.80 and 6,112.05 is: 8,431.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,890.20 : 13,643.80 = 6,112.05 : x
  2. Step 2: Convert to fraction form
    9,890.20/13,643.80 = 6,112.05/x
  3. Step 3: Cross multiply
    9,890.20x = 13,643.80 × 6,112.05
  4. Step 4: Simplify right side
    9,890.20x = 83,391,587.79
  5. Step 5: Solve for x
    x = 83,391,587.79/9,890.20
  6. Step 6: Final answer
    x = 8,431.74

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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.