Home / 15,428.58-21,291.46-8,355.00

Finding the Fourth Proportional to 15,428.58, 21,291.46 and 8,355.00

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Solution

The fourth proportional to 15,428.58, 21,291.46 and 8,355.00 is: 11,529.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,428.58 : 21,291.46 = 8,355.00 : x
  2. Step 2: Convert to fraction form
    15,428.58/21,291.46 = 8,355.00/x
  3. Step 3: Cross multiply
    15,428.58x = 21,291.46 × 8,355.00
  4. Step 4: Simplify right side
    15,428.58x = 177,890,087.49
  5. Step 5: Solve for x
    x = 177,890,087.49/15,428.58
  6. Step 6: Final answer
    x = 11,529.91

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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.