Home / 12,285.20-18,430.80-3,520.16

Finding the Fourth Proportional to 12,285.20, 18,430.80 and 3,520.16

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Solution

The fourth proportional to 12,285.20, 18,430.80 and 3,520.16 is: 5,281.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,285.20 : 18,430.80 = 3,520.16 : x
  2. Step 2: Convert to fraction form
    12,285.20/18,430.80 = 3,520.16/x
  3. Step 3: Cross multiply
    12,285.20x = 18,430.80 × 3,520.16
  4. Step 4: Simplify right side
    12,285.20x = 64,879,364.93
  5. Step 5: Solve for x
    x = 64,879,364.93/12,285.20
  6. Step 6: Final answer
    x = 5,281.10

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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.