Home / 12,613.24-18,920.10-5,218.60

Finding the Fourth Proportional to 12,613.24, 18,920.10 and 5,218.60

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Solution

The fourth proportional to 12,613.24, 18,920.10 and 5,218.60 is: 7,828.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,613.24 : 18,920.10 = 5,218.60 : x
  2. Step 2: Convert to fraction form
    12,613.24/18,920.10 = 5,218.60/x
  3. Step 3: Cross multiply
    12,613.24x = 18,920.10 × 5,218.60
  4. Step 4: Simplify right side
    12,613.24x = 98,736,433.86
  5. Step 5: Solve for x
    x = 98,736,433.86/12,613.24
  6. Step 6: Final answer
    x = 7,828.00

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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.