Home / 19,817.68-27,372.36-15,680.72

Finding the Fourth Proportional to 19,817.68, 27,372.36 and 15,680.72

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Solution

The fourth proportional to 19,817.68, 27,372.36 and 15,680.72 is: 21,658.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,817.68 : 27,372.36 = 15,680.72 : x
  2. Step 2: Convert to fraction form
    19,817.68/27,372.36 = 15,680.72/x
  3. Step 3: Cross multiply
    19,817.68x = 27,372.36 × 15,680.72
  4. Step 4: Simplify right side
    19,817.68x = 429,218,312.90
  5. Step 5: Solve for x
    x = 429,218,312.90/19,817.68
  6. Step 6: Final answer
    x = 21,658.35

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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.