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Finding the Fourth Proportional to 19,659.69, 27,139.68 and 11,590.88

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Solution

The fourth proportional to 19,659.69, 27,139.68 and 11,590.88 is: 16,000.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,659.69 : 27,139.68 = 11,590.88 : x
  2. Step 2: Convert to fraction form
    19,659.69/27,139.68 = 11,590.88/x
  3. Step 3: Cross multiply
    19,659.69x = 27,139.68 × 11,590.88
  4. Step 4: Simplify right side
    19,659.69x = 314,572,638.42
  5. Step 5: Solve for x
    x = 314,572,638.42/19,659.69
  6. Step 6: Final answer
    x = 16,000.90

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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.