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Finding the Fourth Proportional to 30,644.55, 45,965.91 and 8,459.28

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Solution

The fourth proportional to 30,644.55, 45,965.91 and 8,459.28 is: 12,688.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,644.55 : 45,965.91 = 8,459.28 : x
  2. Step 2: Convert to fraction form
    30,644.55/45,965.91 = 8,459.28/x
  3. Step 3: Cross multiply
    30,644.55x = 45,965.91 × 8,459.28
  4. Step 4: Simplify right side
    30,644.55x = 388,838,503.14
  5. Step 5: Solve for x
    x = 388,838,503.14/30,644.55
  6. Step 6: Final answer
    x = 12,688.67

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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.