Home / 19,731.79-27,231.75-10,780.64

Finding the Fourth Proportional to 19,731.79, 27,231.75 and 10,780.64

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Solution

The fourth proportional to 19,731.79, 27,231.75 and 10,780.64 is: 14,878.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,731.79 : 27,231.75 = 10,780.64 : x
  2. Step 2: Convert to fraction form
    19,731.79/27,231.75 = 10,780.64/x
  3. Step 3: Cross multiply
    19,731.79x = 27,231.75 × 10,780.64
  4. Step 4: Simplify right side
    19,731.79x = 293,575,659.28
  5. Step 5: Solve for x
    x = 293,575,659.28/19,731.79
  6. Step 6: Final answer
    x = 14,878.31

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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.