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Finding the Fourth Proportional to 12,505.90, 18,762.18 and 3,740.90

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Solution

The fourth proportional to 12,505.90, 18,762.18 and 3,740.90 is: 5,612.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,505.90 : 18,762.18 = 3,740.90 : x
  2. Step 2: Convert to fraction form
    12,505.90/18,762.18 = 3,740.90/x
  3. Step 3: Cross multiply
    12,505.90x = 18,762.18 × 3,740.90
  4. Step 4: Simplify right side
    12,505.90x = 70,187,439.16
  5. Step 5: Solve for x
    x = 70,187,439.16/12,505.90
  6. Step 6: Final answer
    x = 5,612.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.