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Finding the Fourth Proportional to 40,507.20, 60,760.40 and 12,805.20

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Solution

The fourth proportional to 40,507.20, 60,760.40 and 12,805.20 is: 19,207.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,507.20 : 60,760.40 = 12,805.20 : x
  2. Step 2: Convert to fraction form
    40,507.20/60,760.40 = 12,805.20/x
  3. Step 3: Cross multiply
    40,507.20x = 60,760.40 × 12,805.20
  4. Step 4: Simplify right side
    40,507.20x = 778,049,074.08
  5. Step 5: Solve for x
    x = 778,049,074.08/40,507.20
  6. Step 6: Final answer
    x = 19,207.67

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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.