Home / 14,979.36-20,668.80-9,315.60

Finding the Fourth Proportional to 14,979.36, 20,668.80 and 9,315.60

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Solution

The fourth proportional to 14,979.36, 20,668.80 and 9,315.60 is: 12,853.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,979.36 : 20,668.80 = 9,315.60 : x
  2. Step 2: Convert to fraction form
    14,979.36/20,668.80 = 9,315.60/x
  3. Step 3: Cross multiply
    14,979.36x = 20,668.80 × 9,315.60
  4. Step 4: Simplify right side
    14,979.36x = 192,542,273.28
  5. Step 5: Solve for x
    x = 192,542,273.28/14,979.36
  6. Step 6: Final answer
    x = 12,853.84

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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.