Home / 13,698.40-18,904.36-8,660.80

Finding the Fourth Proportional to 13,698.40, 18,904.36 and 8,660.80

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Solution

The fourth proportional to 13,698.40, 18,904.36 and 8,660.80 is: 11,952.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,698.40 : 18,904.36 = 8,660.80 : x
  2. Step 2: Convert to fraction form
    13,698.40/18,904.36 = 8,660.80/x
  3. Step 3: Cross multiply
    13,698.40x = 18,904.36 × 8,660.80
  4. Step 4: Simplify right side
    13,698.40x = 163,726,881.09
  5. Step 5: Solve for x
    x = 163,726,881.09/13,698.40
  6. Step 6: Final answer
    x = 11,952.26

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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.