Home / 30,019.76-45,015.92-12,479.12

Finding the Fourth Proportional to 30,019.76, 45,015.92 and 12,479.12

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Solution

The fourth proportional to 30,019.76, 45,015.92 and 12,479.12 is: 18,712.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,019.76 : 45,015.92 = 12,479.12 : x
  2. Step 2: Convert to fraction form
    30,019.76/45,015.92 = 12,479.12/x
  3. Step 3: Cross multiply
    30,019.76x = 45,015.92 × 12,479.12
  4. Step 4: Simplify right side
    30,019.76x = 561,759,067.59
  5. Step 5: Solve for x
    x = 561,759,067.59/30,019.76
  6. Step 6: Final answer
    x = 18,712.98

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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.