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Finding the Fourth Proportional to 5,013.86, 6,919.90 and 2,860.40

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Solution

The fourth proportional to 5,013.86, 6,919.90 and 2,860.40 is: 3,947.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,013.86 : 6,919.90 = 2,860.40 : x
  2. Step 2: Convert to fraction form
    5,013.86/6,919.90 = 2,860.40/x
  3. Step 3: Cross multiply
    5,013.86x = 6,919.90 × 2,860.40
  4. Step 4: Simplify right side
    5,013.86x = 19,793,692.11
  5. Step 5: Solve for x
    x = 19,793,692.11/5,013.86
  6. Step 6: Final answer
    x = 3,947.80

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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.