Home / 29,115.14-40,172.10-21,143.52

Finding the Fourth Proportional to 29,115.14, 40,172.10 and 21,143.52

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Solution

The fourth proportional to 29,115.14, 40,172.10 and 21,143.52 is: 29,173.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,115.14 : 40,172.10 = 21,143.52 : x
  2. Step 2: Convert to fraction form
    29,115.14/40,172.10 = 21,143.52/x
  3. Step 3: Cross multiply
    29,115.14x = 40,172.10 × 21,143.52
  4. Step 4: Simplify right side
    29,115.14x = 849,379,599.79
  5. Step 5: Solve for x
    x = 849,379,599.79/29,115.14
  6. Step 6: Final answer
    x = 29,173.13

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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.