Home / 30,288.21-45,429.71-18,438.91

Finding the Fourth Proportional to 30,288.21, 45,429.71 and 18,438.91

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Solution

The fourth proportional to 30,288.21, 45,429.71 and 18,438.91 is: 27,656.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,288.21 : 45,429.71 = 18,438.91 : x
  2. Step 2: Convert to fraction form
    30,288.21/45,429.71 = 18,438.91/x
  3. Step 3: Cross multiply
    30,288.21x = 45,429.71 × 18,438.91
  4. Step 4: Simplify right side
    30,288.21x = 837,674,266.54
  5. Step 5: Solve for x
    x = 837,674,266.54/30,288.21
  6. Step 6: Final answer
    x = 27,656.78

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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.