Home / 19,910.71-27,471.81-12,640.15

Finding the Fourth Proportional to 19,910.71, 27,471.81 and 12,640.15

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Solution

The fourth proportional to 19,910.71, 27,471.81 and 12,640.15 is: 17,440.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,910.71 : 27,471.81 = 12,640.15 : x
  2. Step 2: Convert to fraction form
    19,910.71/27,471.81 = 12,640.15/x
  3. Step 3: Cross multiply
    19,910.71x = 27,471.81 × 12,640.15
  4. Step 4: Simplify right side
    19,910.71x = 347,247,809.81
  5. Step 5: Solve for x
    x = 347,247,809.81/19,910.71
  6. Step 6: Final answer
    x = 17,440.25

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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.