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Finding the Fourth Proportional to 5,119, 7,063.86 and 3,130.12

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Solution

The fourth proportional to 5,119, 7,063.86 and 3,130.12 is: 4,319.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,119 : 7,063.86 = 3,130.12 : x
  2. Step 2: Convert to fraction form
    5,119/7,063.86 = 3,130.12/x
  3. Step 3: Cross multiply
    5,119x = 7,063.86 × 3,130.12
  4. Step 4: Simplify right side
    5,119x = 22,110,729.46
  5. Step 5: Solve for x
    x = 22,110,729.46/5,119
  6. Step 6: Final answer
    x = 4,319.35

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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.