Home / 20,287.94-27,987.66-12,730.50

Finding the Fourth Proportional to 20,287.94, 27,987.66 and 12,730.50

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Solution

The fourth proportional to 20,287.94, 27,987.66 and 12,730.50 is: 17,562.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,287.94 : 27,987.66 = 12,730.50 : x
  2. Step 2: Convert to fraction form
    20,287.94/27,987.66 = 12,730.50/x
  3. Step 3: Cross multiply
    20,287.94x = 27,987.66 × 12,730.50
  4. Step 4: Simplify right side
    20,287.94x = 356,296,905.63
  5. Step 5: Solve for x
    x = 356,296,905.63/20,287.94
  6. Step 6: Final answer
    x = 17,562.01

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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.