Home / 19,987.90-27,565.48-12,906.88

Finding the Fourth Proportional to 19,987.90, 27,565.48 and 12,906.88

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Solution

The fourth proportional to 19,987.90, 27,565.48 and 12,906.88 is: 17,799.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,987.90 : 27,565.48 = 12,906.88 : x
  2. Step 2: Convert to fraction form
    19,987.90/27,565.48 = 12,906.88/x
  3. Step 3: Cross multiply
    19,987.90x = 27,565.48 × 12,906.88
  4. Step 4: Simplify right side
    19,987.90x = 355,784,342.50
  5. Step 5: Solve for x
    x = 355,784,342.50/19,987.90
  6. Step 6: Final answer
    x = 17,799.99

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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.