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Finding the Fourth Proportional to 29,137.50, 40,209.81 and 15,889.50

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Solution

The fourth proportional to 29,137.50, 40,209.81 and 15,889.50 is: 21,927.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,137.50 : 40,209.81 = 15,889.50 : x
  2. Step 2: Convert to fraction form
    29,137.50/40,209.81 = 15,889.50/x
  3. Step 3: Cross multiply
    29,137.50x = 40,209.81 × 15,889.50
  4. Step 4: Simplify right side
    29,137.50x = 638,913,776.00
  5. Step 5: Solve for x
    x = 638,913,776.00/29,137.50
  6. Step 6: Final answer
    x = 21,927.54

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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.