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Finding the Fourth Proportional to 39,683.86, 59,525.43 and 11,981.86

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Solution

The fourth proportional to 39,683.86, 59,525.43 and 11,981.86 is: 17,972.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,683.86 : 59,525.43 = 11,981.86 : x
  2. Step 2: Convert to fraction form
    39,683.86/59,525.43 = 11,981.86/x
  3. Step 3: Cross multiply
    39,683.86x = 59,525.43 × 11,981.86
  4. Step 4: Simplify right side
    39,683.86x = 713,225,368.70
  5. Step 5: Solve for x
    x = 713,225,368.70/39,683.86
  6. Step 6: Final answer
    x = 17,972.68

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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.