Home / 19,385.20-28,922.70-17,280.28

Finding the Fourth Proportional to 19,385.20, 28,922.70 and 17,280.28

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Solution

The fourth proportional to 19,385.20, 28,922.70 and 17,280.28 is: 25,782.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,385.20 : 28,922.70 = 17,280.28 : x
  2. Step 2: Convert to fraction form
    19,385.20/28,922.70 = 17,280.28/x
  3. Step 3: Cross multiply
    19,385.20x = 28,922.70 × 17,280.28
  4. Step 4: Simplify right side
    19,385.20x = 499,792,354.36
  5. Step 5: Solve for x
    x = 499,792,354.36/19,385.20
  6. Step 6: Final answer
    x = 25,782.16

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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.