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Finding the Fourth Proportional to 29,268.99, 40,391.24 and 15,840.20

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Solution

The fourth proportional to 29,268.99, 40,391.24 and 15,840.20 is: 21,859.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,268.99 : 40,391.24 = 15,840.20 : x
  2. Step 2: Convert to fraction form
    29,268.99/40,391.24 = 15,840.20/x
  3. Step 3: Cross multiply
    29,268.99x = 40,391.24 × 15,840.20
  4. Step 4: Simplify right side
    29,268.99x = 639,805,341.63
  5. Step 5: Solve for x
    x = 639,805,341.63/29,268.99
  6. Step 6: Final answer
    x = 21,859.50

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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.