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Finding the Fourth Proportional to 29,629.29, 40,864.04 and 21,128.69

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Solution

The fourth proportional to 29,629.29, 40,864.04 and 21,128.69 is: 29,140.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,629.29 : 40,864.04 = 21,128.69 : x
  2. Step 2: Convert to fraction form
    29,629.29/40,864.04 = 21,128.69/x
  3. Step 3: Cross multiply
    29,629.29x = 40,864.04 × 21,128.69
  4. Step 4: Simplify right side
    29,629.29x = 863,403,323.34
  5. Step 5: Solve for x
    x = 863,403,323.34/29,629.29
  6. Step 6: Final answer
    x = 29,140.20

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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.