Home / 31,428.78-43,369.14-18,506.01

Finding the Fourth Proportional to 31,428.78, 43,369.14 and 18,506.01

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Solution

The fourth proportional to 31,428.78, 43,369.14 and 18,506.01 is: 25,536.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,428.78 : 43,369.14 = 18,506.01 : x
  2. Step 2: Convert to fraction form
    31,428.78/43,369.14 = 18,506.01/x
  3. Step 3: Cross multiply
    31,428.78x = 43,369.14 × 18,506.01
  4. Step 4: Simplify right side
    31,428.78x = 802,589,738.53
  5. Step 5: Solve for x
    x = 802,589,738.53/31,428.78
  6. Step 6: Final answer
    x = 25,536.78

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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.