Home / 16,911.60-25,345.80-12,289.20

Finding the Fourth Proportional to 16,911.60, 25,345.80 and 12,289.20

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Solution

The fourth proportional to 16,911.60, 25,345.80 and 12,289.20 is: 18,418.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,911.60 : 25,345.80 = 12,289.20 : x
  2. Step 2: Convert to fraction form
    16,911.60/25,345.80 = 12,289.20/x
  3. Step 3: Cross multiply
    16,911.60x = 25,345.80 × 12,289.20
  4. Step 4: Simplify right side
    16,911.60x = 311,479,605.36
  5. Step 5: Solve for x
    x = 311,479,605.36/16,911.60
  6. Step 6: Final answer
    x = 18,418.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.