Home / 12,647.47-18,959.43-5,623.78

Finding the Fourth Proportional to 12,647.47, 18,959.43 and 5,623.78

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Solution

The fourth proportional to 12,647.47, 18,959.43 and 5,623.78 is: 8,430.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,647.47 : 18,959.43 = 5,623.78 : x
  2. Step 2: Convert to fraction form
    12,647.47/18,959.43 = 5,623.78/x
  3. Step 3: Cross multiply
    12,647.47x = 18,959.43 × 5,623.78
  4. Step 4: Simplify right side
    12,647.47x = 106,623,663.25
  5. Step 5: Solve for x
    x = 106,623,663.25/12,647.47
  6. Step 6: Final answer
    x = 8,430.43

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1.5x scale

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.