Home / 20,997.30-28,968.87-13,444.86

Finding the Fourth Proportional to 20,997.30, 28,968.87 and 13,444.86

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Solution

The fourth proportional to 20,997.30, 28,968.87 and 13,444.86 is: 18,549.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,997.30 : 28,968.87 = 13,444.86 : x
  2. Step 2: Convert to fraction form
    20,997.30/28,968.87 = 13,444.86/x
  3. Step 3: Cross multiply
    20,997.30x = 28,968.87 × 13,444.86
  4. Step 4: Simplify right side
    20,997.30x = 389,482,401.51
  5. Step 5: Solve for x
    x = 389,482,401.51/20,997.30
  6. Step 6: Final answer
    x = 18,549.17

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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.