Home / 20,900.43-31,361.40-13,885.29

Finding the Fourth Proportional to 20,900.43, 31,361.40 and 13,885.29

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Solution

The fourth proportional to 20,900.43, 31,361.40 and 13,885.29 is: 20,835.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,900.43 : 31,361.40 = 13,885.29 : x
  2. Step 2: Convert to fraction form
    20,900.43/31,361.40 = 13,885.29/x
  3. Step 3: Cross multiply
    20,900.43x = 31,361.40 × 13,885.29
  4. Step 4: Simplify right side
    20,900.43x = 435,462,133.81
  5. Step 5: Solve for x
    x = 435,462,133.81/20,900.43
  6. Step 6: Final answer
    x = 20,835.08

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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.