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Finding the Fourth Proportional to 12,507.80, 18,740.10 and 5,919.80

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Solution

The fourth proportional to 12,507.80, 18,740.10 and 5,919.80 is: 8,869.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,507.80 : 18,740.10 = 5,919.80 : x
  2. Step 2: Convert to fraction form
    12,507.80/18,740.10 = 5,919.80/x
  3. Step 3: Cross multiply
    12,507.80x = 18,740.10 × 5,919.80
  4. Step 4: Simplify right side
    12,507.80x = 110,937,643.98
  5. Step 5: Solve for x
    x = 110,937,643.98/12,507.80
  6. Step 6: Final answer
    x = 8,869.48

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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.