Home / 21,920.92-30,260.45-13,973.60

Finding the Fourth Proportional to 21,920.92, 30,260.45 and 13,973.60

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Solution

The fourth proportional to 21,920.92, 30,260.45 and 13,973.60 is: 19,289.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,920.92 : 30,260.45 = 13,973.60 : x
  2. Step 2: Convert to fraction form
    21,920.92/30,260.45 = 13,973.60/x
  3. Step 3: Cross multiply
    21,920.92x = 30,260.45 × 13,973.60
  4. Step 4: Simplify right side
    21,920.92x = 422,847,534.71
  5. Step 5: Solve for x
    x = 422,847,534.71/21,920.92
  6. Step 6: Final answer
    x = 19,289.68

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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.