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Finding the Fourth Proportional to 29,415.72, 40,593.74 and 15,987.12

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Solution

The fourth proportional to 29,415.72, 40,593.74 and 15,987.12 is: 22,062.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,415.72 : 40,593.74 = 15,987.12 : x
  2. Step 2: Convert to fraction form
    29,415.72/40,593.74 = 15,987.12/x
  3. Step 3: Cross multiply
    29,415.72x = 40,593.74 × 15,987.12
  4. Step 4: Simplify right side
    29,415.72x = 648,976,992.63
  5. Step 5: Solve for x
    x = 648,976,992.63/29,415.72
  6. Step 6: Final answer
    x = 22,062.25

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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.