Home / 14,778.72-20,389.68-9,189.36

Finding the Fourth Proportional to 14,778.72, 20,389.68 and 9,189.36

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Solution

The fourth proportional to 14,778.72, 20,389.68 and 9,189.36 is: 12,678.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,778.72 : 20,389.68 = 9,189.36 : x
  2. Step 2: Convert to fraction form
    14,778.72/20,389.68 = 9,189.36/x
  3. Step 3: Cross multiply
    14,778.72x = 20,389.68 × 9,189.36
  4. Step 4: Simplify right side
    14,778.72x = 187,368,109.80
  5. Step 5: Solve for x
    x = 187,368,109.80/14,778.72
  6. Step 6: Final answer
    x = 12,678.24

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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.