Home / 12,345.78-18,518.67-4,552.77

Finding the Fourth Proportional to 12,345.78, 18,518.67 and 4,552.77

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Solution

The fourth proportional to 12,345.78, 18,518.67 and 4,552.77 is: 6,829.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,345.78 : 18,518.67 = 4,552.77 : x
  2. Step 2: Convert to fraction form
    12,345.78/18,518.67 = 4,552.77/x
  3. Step 3: Cross multiply
    12,345.78x = 18,518.67 × 4,552.77
  4. Step 4: Simplify right side
    12,345.78x = 84,311,245.22
  5. Step 5: Solve for x
    x = 84,311,245.22/12,345.78
  6. Step 6: Final answer
    x = 6,829.16

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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.