Home / 19,677.20-27,189.12-15,730.88

Finding the Fourth Proportional to 19,677.20, 27,189.12 and 15,730.88

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Solution

The fourth proportional to 19,677.20, 27,189.12 and 15,730.88 is: 21,736.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,677.20 : 27,189.12 = 15,730.88 : x
  2. Step 2: Convert to fraction form
    19,677.20/27,189.12 = 15,730.88/x
  3. Step 3: Cross multiply
    19,677.20x = 27,189.12 × 15,730.88
  4. Step 4: Simplify right side
    19,677.20x = 427,708,784.03
  5. Step 5: Solve for x
    x = 427,708,784.03/19,677.20
  6. Step 6: Final answer
    x = 21,736.26

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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.