Home / 15,428.80-21,291.72-8,355.22

Finding the Fourth Proportional to 15,428.80, 21,291.72 and 8,355.22

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Solution

The fourth proportional to 15,428.80, 21,291.72 and 8,355.22 is: 11,530.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,428.80 : 21,291.72 = 8,355.22 : x
  2. Step 2: Convert to fraction form
    15,428.80/21,291.72 = 8,355.22/x
  3. Step 3: Cross multiply
    15,428.80x = 21,291.72 × 8,355.22
  4. Step 4: Simplify right side
    15,428.80x = 177,897,004.78
  5. Step 5: Solve for x
    x = 177,897,004.78/15,428.80
  6. Step 6: Final answer
    x = 11,530.19

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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.