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Finding the Fourth Proportional to 29,368.78, 40,529.12 and 15,940.26

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Solution

The fourth proportional to 29,368.78, 40,529.12 and 15,940.26 is: 21,997.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,368.78 : 40,529.12 = 15,940.26 : x
  2. Step 2: Convert to fraction form
    29,368.78/40,529.12 = 15,940.26/x
  3. Step 3: Cross multiply
    29,368.78x = 40,529.12 × 15,940.26
  4. Step 4: Simplify right side
    29,368.78x = 646,044,710.37
  5. Step 5: Solve for x
    x = 646,044,710.37/29,368.78
  6. Step 6: Final answer
    x = 21,997.67

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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.