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Finding the Fourth Proportional to 29,133.80, 40,203.78 and 15,885.80

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Solution

The fourth proportional to 29,133.80, 40,203.78 and 15,885.80 is: 21,921.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,133.80 : 40,203.78 = 15,885.80 : x
  2. Step 2: Convert to fraction form
    29,133.80/40,203.78 = 15,885.80/x
  3. Step 3: Cross multiply
    29,133.80x = 40,203.78 × 15,885.80
  4. Step 4: Simplify right side
    29,133.80x = 638,669,208.32
  5. Step 5: Solve for x
    x = 638,669,208.32/29,133.80
  6. Step 6: Final answer
    x = 21,921.93

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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.