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Finding the Fourth Proportional to 20,279.59, 27,985.70 and 11,327.01

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Solution

The fourth proportional to 20,279.59, 27,985.70 and 11,327.01 is: 15,631.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,279.59 : 27,985.70 = 11,327.01 : x
  2. Step 2: Convert to fraction form
    20,279.59/27,985.70 = 11,327.01/x
  3. Step 3: Cross multiply
    20,279.59x = 27,985.70 × 11,327.01
  4. Step 4: Simplify right side
    20,279.59x = 316,994,463.26
  5. Step 5: Solve for x
    x = 316,994,463.26/20,279.59
  6. Step 6: Final answer
    x = 15,631.21

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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.