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Finding the Fourth Proportional to 12,465.78, 18,699.78 and 4,570.44

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Solution

The fourth proportional to 12,465.78, 18,699.78 and 4,570.44 is: 6,856.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,465.78 : 18,699.78 = 4,570.44 : x
  2. Step 2: Convert to fraction form
    12,465.78/18,699.78 = 4,570.44/x
  3. Step 3: Cross multiply
    12,465.78x = 18,699.78 × 4,570.44
  4. Step 4: Simplify right side
    12,465.78x = 85,466,222.50
  5. Step 5: Solve for x
    x = 85,466,222.50/12,465.78
  6. Step 6: Final answer
    x = 6,856.07

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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.