Home / 20,055.90-27,689.75-12,889.02

Finding the Fourth Proportional to 20,055.90, 27,689.75 and 12,889.02

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Solution

The fourth proportional to 20,055.90, 27,689.75 and 12,889.02 is: 17,794.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,055.90 : 27,689.75 = 12,889.02 : x
  2. Step 2: Convert to fraction form
    20,055.90/27,689.75 = 12,889.02/x
  3. Step 3: Cross multiply
    20,055.90x = 27,689.75 × 12,889.02
  4. Step 4: Simplify right side
    20,055.90x = 356,893,829.27
  5. Step 5: Solve for x
    x = 356,893,829.27/20,055.90
  6. Step 6: Final answer
    x = 17,794.95

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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.