Home / 19,725.84-27,191.43-15,740.64

Finding the Fourth Proportional to 19,725.84, 27,191.43 and 15,740.64

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Solution

The fourth proportional to 19,725.84, 27,191.43 and 15,740.64 is: 21,697.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,725.84 : 27,191.43 = 15,740.64 : x
  2. Step 2: Convert to fraction form
    19,725.84/27,191.43 = 15,740.64/x
  3. Step 3: Cross multiply
    19,725.84x = 27,191.43 × 15,740.64
  4. Step 4: Simplify right side
    19,725.84x = 428,010,510.72
  5. Step 5: Solve for x
    x = 428,010,510.72/19,725.84
  6. Step 6: Final answer
    x = 21,697.96

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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.