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Finding the Fourth Proportional to 14,997.88, 20,721.18 and 12,783.16

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Solution

The fourth proportional to 14,997.88, 20,721.18 and 12,783.16 is: 17,661.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,997.88 : 20,721.18 = 12,783.16 : x
  2. Step 2: Convert to fraction form
    14,997.88/20,721.18 = 12,783.16/x
  3. Step 3: Cross multiply
    14,997.88x = 20,721.18 × 12,783.16
  4. Step 4: Simplify right side
    14,997.88x = 264,882,159.33
  5. Step 5: Solve for x
    x = 264,882,159.33/14,997.88
  6. Step 6: Final answer
    x = 17,661.31

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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.