Home / 13,680.02-18,879.84-8,378.36

Finding the Fourth Proportional to 13,680.02, 18,879.84 and 8,378.36

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Solution

The fourth proportional to 13,680.02, 18,879.84 and 8,378.36 is: 11,563.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,680.02 : 18,879.84 = 8,378.36 : x
  2. Step 2: Convert to fraction form
    13,680.02/18,879.84 = 8,378.36/x
  3. Step 3: Cross multiply
    13,680.02x = 18,879.84 × 8,378.36
  4. Step 4: Simplify right side
    13,680.02x = 158,182,096.26
  5. Step 5: Solve for x
    x = 158,182,096.26/13,680.02
  6. Step 6: Final answer
    x = 11,563.00

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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.