Home / 20,156.70-27,815.05-11,203.90

Finding the Fourth Proportional to 20,156.70, 27,815.05 and 11,203.90

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Solution

The fourth proportional to 20,156.70, 27,815.05 and 11,203.90 is: 15,460.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,156.70 : 27,815.05 = 11,203.90 : x
  2. Step 2: Convert to fraction form
    20,156.70/27,815.05 = 11,203.90/x
  3. Step 3: Cross multiply
    20,156.70x = 27,815.05 × 11,203.90
  4. Step 4: Simplify right side
    20,156.70x = 311,637,038.70
  5. Step 5: Solve for x
    x = 311,637,038.70/20,156.70
  6. Step 6: Final answer
    x = 15,460.72

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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.