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Finding the Fourth Proportional to 7,139.03, 9,857.90 and 4,487.29

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Solution

The fourth proportional to 7,139.03, 9,857.90 and 4,487.29 is: 6,196.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,139.03 : 9,857.90 = 4,487.29 : x
  2. Step 2: Convert to fraction form
    7,139.03/9,857.90 = 4,487.29/x
  3. Step 3: Cross multiply
    7,139.03x = 9,857.90 × 4,487.29
  4. Step 4: Simplify right side
    7,139.03x = 44,235,242.66
  5. Step 5: Solve for x
    x = 44,235,242.66/7,139.03
  6. Step 6: Final answer
    x = 6,196.26

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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.