Home / 20,428.10-30,626.57-10,561.08

Finding the Fourth Proportional to 20,428.10, 30,626.57 and 10,561.08

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Solution

The fourth proportional to 20,428.10, 30,626.57 and 10,561.08 is: 15,833.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,428.10 : 30,626.57 = 10,561.08 : x
  2. Step 2: Convert to fraction form
    20,428.10/30,626.57 = 10,561.08/x
  3. Step 3: Cross multiply
    20,428.10x = 30,626.57 × 10,561.08
  4. Step 4: Simplify right side
    20,428.10x = 323,449,603.09
  5. Step 5: Solve for x
    x = 323,449,603.09/20,428.10
  6. Step 6: Final answer
    x = 15,833.57

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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.