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Finding the Fourth Proportional to 20,675.76, 30,995.16 and 7,518.86

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Solution

The fourth proportional to 20,675.76, 30,995.16 and 7,518.86 is: 11,271.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,675.76 : 30,995.16 = 7,518.86 : x
  2. Step 2: Convert to fraction form
    20,675.76/30,995.16 = 7,518.86/x
  3. Step 3: Cross multiply
    20,675.76x = 30,995.16 × 7,518.86
  4. Step 4: Simplify right side
    20,675.76x = 233,048,268.72
  5. Step 5: Solve for x
    x = 233,048,268.72/20,675.76
  6. Step 6: Final answer
    x = 11,271.57

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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.