Home / 7,121.15-9,827.23-4,137.05

Finding the Fourth Proportional to 7,121.15, 9,827.23 and 4,137.05

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Solution

The fourth proportional to 7,121.15, 9,827.23 and 4,137.05 is: 5,709.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,121.15 : 9,827.23 = 4,137.05 : x
  2. Step 2: Convert to fraction form
    7,121.15/9,827.23 = 4,137.05/x
  3. Step 3: Cross multiply
    7,121.15x = 9,827.23 × 4,137.05
  4. Step 4: Simplify right side
    7,121.15x = 40,655,692.74
  5. Step 5: Solve for x
    x = 40,655,692.74/7,121.15
  6. Step 6: Final answer
    x = 5,709.15

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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.