Home / 9,899.76-13,656.49-6,121.72

Finding the Fourth Proportional to 9,899.76, 13,656.49 and 6,121.72

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Solution

The fourth proportional to 9,899.76, 13,656.49 and 6,121.72 is: 8,444.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,899.76 : 13,656.49 = 6,121.72 : x
  2. Step 2: Convert to fraction form
    9,899.76/13,656.49 = 6,121.72/x
  3. Step 3: Cross multiply
    9,899.76x = 13,656.49 × 6,121.72
  4. Step 4: Simplify right side
    9,899.76x = 83,601,158.52
  5. Step 5: Solve for x
    x = 83,601,158.52/9,899.76
  6. Step 6: Final answer
    x = 8,444.77

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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.