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Finding the Fourth Proportional to 7,138.99, 9,853.95 and 4,486.38

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Solution

The fourth proportional to 7,138.99, 9,853.95 and 4,486.38 is: 6,192.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,138.99 : 9,853.95 = 4,486.38 : x
  2. Step 2: Convert to fraction form
    7,138.99/9,853.95 = 4,486.38/x
  3. Step 3: Cross multiply
    7,138.99x = 9,853.95 × 4,486.38
  4. Step 4: Simplify right side
    7,138.99x = 44,208,564.20
  5. Step 5: Solve for x
    x = 44,208,564.20/7,138.99
  6. Step 6: Final answer
    x = 6,192.55

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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.