Home / 22,581.21-31,159.12-13,021.45

Finding the Fourth Proportional to 22,581.21, 31,159.12 and 13,021.45

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Solution

The fourth proportional to 22,581.21, 31,159.12 and 13,021.45 is: 17,967.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,581.21 : 31,159.12 = 13,021.45 : x
  2. Step 2: Convert to fraction form
    22,581.21/31,159.12 = 13,021.45/x
  3. Step 3: Cross multiply
    22,581.21x = 31,159.12 × 13,021.45
  4. Step 4: Simplify right side
    22,581.21x = 405,736,923.12
  5. Step 5: Solve for x
    x = 405,736,923.12/22,581.21
  6. Step 6: Final answer
    x = 17,967.90

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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.