Home / 13,490.06-18,615.87-8,456.99

Finding the Fourth Proportional to 13,490.06, 18,615.87 and 8,456.99

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Solution

The fourth proportional to 13,490.06, 18,615.87 and 8,456.99 is: 11,670.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,490.06 : 18,615.87 = 8,456.99 : x
  2. Step 2: Convert to fraction form
    13,490.06/18,615.87 = 8,456.99/x
  3. Step 3: Cross multiply
    13,490.06x = 18,615.87 × 8,456.99
  4. Step 4: Simplify right side
    13,490.06x = 157,434,226.43
  5. Step 5: Solve for x
    x = 157,434,226.43/13,490.06
  6. Step 6: Final answer
    x = 11,670.39

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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.