Home / 19,669.20-27,178.02-15,722.88

Finding the Fourth Proportional to 19,669.20, 27,178.02 and 15,722.88

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Solution

The fourth proportional to 19,669.20, 27,178.02 and 15,722.88 is: 21,725.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,669.20 : 27,178.02 = 15,722.88 : x
  2. Step 2: Convert to fraction form
    19,669.20/27,178.02 = 15,722.88/x
  3. Step 3: Cross multiply
    19,669.20x = 27,178.02 × 15,722.88
  4. Step 4: Simplify right side
    19,669.20x = 427,316,747.10
  5. Step 5: Solve for x
    x = 427,316,747.10/19,669.20
  6. Step 6: Final answer
    x = 21,725.17

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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.