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Finding the Fourth Proportional to 33,318.58, 45,978.40 and 18,211.12

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Solution

The fourth proportional to 33,318.58, 45,978.40 and 18,211.12 is: 25,130.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    33,318.58 : 45,978.40 = 18,211.12 : x
  2. Step 2: Convert to fraction form
    33,318.58/45,978.40 = 18,211.12/x
  3. Step 3: Cross multiply
    33,318.58x = 45,978.40 × 18,211.12
  4. Step 4: Simplify right side
    33,318.58x = 837,318,159.81
  5. Step 5: Solve for x
    x = 837,318,159.81/33,318.58
  6. Step 6: Final answer
    x = 25,130.67

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.