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Finding the Fourth Proportional to 30,502.08, 45,778.08 and 12,991.68

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Solution

The fourth proportional to 30,502.08, 45,778.08 and 12,991.68 is: 19,498.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,502.08 : 45,778.08 = 12,991.68 : x
  2. Step 2: Convert to fraction form
    30,502.08/45,778.08 = 12,991.68/x
  3. Step 3: Cross multiply
    30,502.08x = 45,778.08 × 12,991.68
  4. Step 4: Simplify right side
    30,502.08x = 594,734,166.37
  5. Step 5: Solve for x
    x = 594,734,166.37/30,502.08
  6. Step 6: Final answer
    x = 19,498.15

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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.