Home / 19,140.20-28,698.54-7,439.78

Finding the Fourth Proportional to 19,140.20, 28,698.54 and 7,439.78

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Solution

The fourth proportional to 19,140.20, 28,698.54 and 7,439.78 is: 11,155.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,140.20 : 28,698.54 = 7,439.78 : x
  2. Step 2: Convert to fraction form
    19,140.20/28,698.54 = 7,439.78/x
  3. Step 3: Cross multiply
    19,140.20x = 28,698.54 × 7,439.78
  4. Step 4: Simplify right side
    19,140.20x = 213,510,823.92
  5. Step 5: Solve for x
    x = 213,510,823.92/19,140.20
  6. Step 6: Final answer
    x = 11,155.10

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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.