Home / 19,784.10-27,320.56-12,722.78

Finding the Fourth Proportional to 19,784.10, 27,320.56 and 12,722.78

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Solution

The fourth proportional to 19,784.10, 27,320.56 and 12,722.78 is: 17,569.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,784.10 : 27,320.56 = 12,722.78 : x
  2. Step 2: Convert to fraction form
    19,784.10/27,320.56 = 12,722.78/x
  3. Step 3: Cross multiply
    19,784.10x = 27,320.56 × 12,722.78
  4. Step 4: Simplify right side
    19,784.10x = 347,593,474.36
  5. Step 5: Solve for x
    x = 347,593,474.36/19,784.10
  6. Step 6: Final answer
    x = 17,569.33

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.