Home / 12,768.60-19,152.90-8,621.40

Finding the Fourth Proportional to 12,768.60, 19,152.90 and 8,621.40

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Solution

The fourth proportional to 12,768.60, 19,152.90 and 8,621.40 is: 12,932.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,768.60 : 19,152.90 = 8,621.40 : x
  2. Step 2: Convert to fraction form
    12,768.60/19,152.90 = 8,621.40/x
  3. Step 3: Cross multiply
    12,768.60x = 19,152.90 × 8,621.40
  4. Step 4: Simplify right side
    12,768.60x = 165,124,812.06
  5. Step 5: Solve for x
    x = 165,124,812.06/12,768.60
  6. Step 6: Final answer
    x = 12,932.10

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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.