Home / 30,581.74-42,226.68-19,831.78

Finding the Fourth Proportional to 30,581.74, 42,226.68 and 19,831.78

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Solution

The fourth proportional to 30,581.74, 42,226.68 and 19,831.78 is: 27,383.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,581.74 : 42,226.68 = 19,831.78 : x
  2. Step 2: Convert to fraction form
    30,581.74/42,226.68 = 19,831.78/x
  3. Step 3: Cross multiply
    30,581.74x = 42,226.68 × 19,831.78
  4. Step 4: Simplify right side
    30,581.74x = 837,430,227.89
  5. Step 5: Solve for x
    x = 837,430,227.89/30,581.74
  6. Step 6: Final answer
    x = 27,383.34

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Double scale
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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.