Home / 30,255.71-45,336.16-19,138.92

Finding the Fourth Proportional to 30,255.71, 45,336.16 and 19,138.92

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Solution

The fourth proportional to 30,255.71, 45,336.16 and 19,138.92 is: 28,678.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,255.71 : 45,336.16 = 19,138.92 : x
  2. Step 2: Convert to fraction form
    30,255.71/45,336.16 = 19,138.92/x
  3. Step 3: Cross multiply
    30,255.71x = 45,336.16 × 19,138.92
  4. Step 4: Simplify right side
    30,255.71x = 867,684,885.60
  5. Step 5: Solve for x
    x = 867,684,885.60/30,255.71
  6. Step 6: Final answer
    x = 28,678.38

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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.