Home / 19,385.70-28,923.45-17,280.78

Finding the Fourth Proportional to 19,385.70, 28,923.45 and 17,280.78

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Solution

The fourth proportional to 19,385.70, 28,923.45 and 17,280.78 is: 25,782.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,385.70 : 28,923.45 = 17,280.78 : x
  2. Step 2: Convert to fraction form
    19,385.70/28,923.45 = 17,280.78/x
  3. Step 3: Cross multiply
    19,385.70x = 28,923.45 × 17,280.78
  4. Step 4: Simplify right side
    19,385.70x = 499,819,776.29
  5. Step 5: Solve for x
    x = 499,819,776.29/19,385.70
  6. Step 6: Final answer
    x = 25,782.91

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.