Home / 12,750.84-19,121.40-5,355

Finding the Fourth Proportional to 12,750.84, 19,121.40 and 5,355

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Solution

The fourth proportional to 12,750.84, 19,121.40 and 5,355 is: 8,030.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,750.84 : 19,121.40 = 5,355 : x
  2. Step 2: Convert to fraction form
    12,750.84/19,121.40 = 5,355/x
  3. Step 3: Cross multiply
    12,750.84x = 19,121.40 × 5,355
  4. Step 4: Simplify right side
    12,750.84x = 102,395,097.00
  5. Step 5: Solve for x
    x = 102,395,097.00/12,750.84
  6. Step 6: Final answer
    x = 8,030.46

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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.