Home / 15,428.97-21,291.94-8,355.45

Finding the Fourth Proportional to 15,428.97, 21,291.94 and 8,355.45

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Solution

The fourth proportional to 15,428.97, 21,291.94 and 8,355.45 is: 11,530.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,428.97 : 21,291.94 = 8,355.45 : x
  2. Step 2: Convert to fraction form
    15,428.97/21,291.94 = 8,355.45/x
  3. Step 3: Cross multiply
    15,428.97x = 21,291.94 × 8,355.45
  4. Step 4: Simplify right side
    15,428.97x = 177,903,740.07
  5. Step 5: Solve for x
    x = 177,903,740.07/15,428.97
  6. Step 6: Final answer
    x = 11,530.50

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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.