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Finding the Fourth Proportional to 39,318, 54,249.91 and 32,970.21

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Solution

The fourth proportional to 39,318, 54,249.91 and 32,970.21 is: 45,491.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,318 : 54,249.91 = 32,970.21 : x
  2. Step 2: Convert to fraction form
    39,318/54,249.91 = 32,970.21/x
  3. Step 3: Cross multiply
    39,318x = 54,249.91 × 32,970.21
  4. Step 4: Simplify right side
    39,318x = 1,788,630,925.18
  5. Step 5: Solve for x
    x = 1,788,630,925.18/39,318
  6. Step 6: Final answer
    x = 45,491.40

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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.