Home / 12,905.30-19,359.05-4,020

Finding the Fourth Proportional to 12,905.30, 19,359.05 and 4,020

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Solution

The fourth proportional to 12,905.30, 19,359.05 and 4,020 is: 6,030.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,905.30 : 19,359.05 = 4,020 : x
  2. Step 2: Convert to fraction form
    12,905.30/19,359.05 = 4,020/x
  3. Step 3: Cross multiply
    12,905.30x = 19,359.05 × 4,020
  4. Step 4: Simplify right side
    12,905.30x = 77,823,360.90
  5. Step 5: Solve for x
    x = 77,823,360.90/12,905.30
  6. Step 6: Final answer
    x = 6,030.34

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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.