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Finding the Fourth Proportional to 39,289.68, 58,943.04 and 12,993.12

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Solution

The fourth proportional to 39,289.68, 58,943.04 and 12,993.12 is: 19,492.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,289.68 : 58,943.04 = 12,993.12 : x
  2. Step 2: Convert to fraction form
    39,289.68/58,943.04 = 12,993.12/x
  3. Step 3: Cross multiply
    39,289.68x = 58,943.04 × 12,993.12
  4. Step 4: Simplify right side
    39,289.68x = 765,853,991.88
  5. Step 5: Solve for x
    x = 765,853,991.88/39,289.68
  6. Step 6: Final answer
    x = 19,492.50

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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.