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Finding the Fourth Proportional to 5,355.66, 7,390.98 and 3,118.32

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Solution

The fourth proportional to 5,355.66, 7,390.98 and 3,118.32 is: 4,303.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,355.66 : 7,390.98 = 3,118.32 : x
  2. Step 2: Convert to fraction form
    5,355.66/7,390.98 = 3,118.32/x
  3. Step 3: Cross multiply
    5,355.66x = 7,390.98 × 3,118.32
  4. Step 4: Simplify right side
    5,355.66x = 23,047,440.75
  5. Step 5: Solve for x
    x = 23,047,440.75/5,355.66
  6. Step 6: Final answer
    x = 4,303.38

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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.