Home / 20,155.70-27,812.85-11,657.18

Finding the Fourth Proportional to 20,155.70, 27,812.85 and 11,657.18

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Solution

The fourth proportional to 20,155.70, 27,812.85 and 11,657.18 is: 16,085.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,155.70 : 27,812.85 = 11,657.18 : x
  2. Step 2: Convert to fraction form
    20,155.70/27,812.85 = 11,657.18/x
  3. Step 3: Cross multiply
    20,155.70x = 27,812.85 × 11,657.18
  4. Step 4: Simplify right side
    20,155.70x = 324,219,398.76
  5. Step 5: Solve for x
    x = 324,219,398.76/20,155.70
  6. Step 6: Final answer
    x = 16,085.74

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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.