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Finding the Fourth Proportional to 28,359.70, 39,140.74 and 17,035.50

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Solution

The fourth proportional to 28,359.70, 39,140.74 and 17,035.50 is: 23,511.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,359.70 : 39,140.74 = 17,035.50 : x
  2. Step 2: Convert to fraction form
    28,359.70/39,140.74 = 17,035.50/x
  3. Step 3: Cross multiply
    28,359.70x = 39,140.74 × 17,035.50
  4. Step 4: Simplify right side
    28,359.70x = 666,782,076.27
  5. Step 5: Solve for x
    x = 666,782,076.27/28,359.70
  6. Step 6: Final answer
    x = 23,511.61

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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.