Home / 19,140.20-28,698.56-7,439.76

Finding the Fourth Proportional to 19,140.20, 28,698.56 and 7,439.76

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Solution

The fourth proportional to 19,140.20, 28,698.56 and 7,439.76 is: 11,155.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,140.20 : 28,698.56 = 7,439.76 : x
  2. Step 2: Convert to fraction form
    19,140.20/28,698.56 = 7,439.76/x
  3. Step 3: Cross multiply
    19,140.20x = 28,698.56 × 7,439.76
  4. Step 4: Simplify right side
    19,140.20x = 213,510,398.75
  5. Step 5: Solve for x
    x = 213,510,398.75/19,140.20
  6. Step 6: Final answer
    x = 11,155.08

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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.