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Finding the Fourth Proportional to 64,891.56, 97,336.72 and 20,518.30

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Solution

The fourth proportional to 64,891.56, 97,336.72 and 20,518.30 is: 30,777.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,891.56 : 97,336.72 = 20,518.30 : x
  2. Step 2: Convert to fraction form
    64,891.56/97,336.72 = 20,518.30/x
  3. Step 3: Cross multiply
    64,891.56x = 97,336.72 × 20,518.30
  4. Step 4: Simplify right side
    64,891.56x = 1,997,184,021.98
  5. Step 5: Solve for x
    x = 1,997,184,021.98/64,891.56
  6. Step 6: Final answer
    x = 30,777.25

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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.