Home / 20,115.14-27,762.75-12,947.45

Finding the Fourth Proportional to 20,115.14, 27,762.75 and 12,947.45

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Solution

The fourth proportional to 20,115.14, 27,762.75 and 12,947.45 is: 17,869.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,115.14 : 27,762.75 = 12,947.45 : x
  2. Step 2: Convert to fraction form
    20,115.14/27,762.75 = 12,947.45/x
  3. Step 3: Cross multiply
    20,115.14x = 27,762.75 × 12,947.45
  4. Step 4: Simplify right side
    20,115.14x = 359,456,678.67
  5. Step 5: Solve for x
    x = 359,456,678.67/20,115.14
  6. Step 6: Final answer
    x = 17,869.96

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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.