Home / 20,970.19-31,486.26-13,993.66

Finding the Fourth Proportional to 20,970.19, 31,486.26 and 13,993.66

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Solution

The fourth proportional to 20,970.19, 31,486.26 and 13,993.66 is: 21,011.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,970.19 : 31,486.26 = 13,993.66 : x
  2. Step 2: Convert to fraction form
    20,970.19/31,486.26 = 13,993.66/x
  3. Step 3: Cross multiply
    20,970.19x = 31,486.26 × 13,993.66
  4. Step 4: Simplify right side
    20,970.19x = 440,607,859.68
  5. Step 5: Solve for x
    x = 440,607,859.68/20,970.19
  6. Step 6: Final answer
    x = 21,011.16

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.