Home / 20,428.26-30,642.59-6,388.93

Finding the Fourth Proportional to 20,428.26, 30,642.59 and 6,388.93

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Solution

The fourth proportional to 20,428.26, 30,642.59 and 6,388.93 is: 9,583.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,428.26 : 30,642.59 = 6,388.93 : x
  2. Step 2: Convert to fraction form
    20,428.26/30,642.59 = 6,388.93/x
  3. Step 3: Cross multiply
    20,428.26x = 30,642.59 × 6,388.93
  4. Step 4: Simplify right side
    20,428.26x = 195,773,362.53
  5. Step 5: Solve for x
    x = 195,773,362.53/20,428.26
  6. Step 6: Final answer
    x = 9,583.46

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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.