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Finding the Fourth Proportional to 13,993.67, 20,985.56 and 4,130.31

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Solution

The fourth proportional to 13,993.67, 20,985.56 and 4,130.31 is: 6,194.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,993.67 : 20,985.56 = 4,130.31 : x
  2. Step 2: Convert to fraction form
    13,993.67/20,985.56 = 4,130.31/x
  3. Step 3: Cross multiply
    13,993.67x = 20,985.56 × 4,130.31
  4. Step 4: Simplify right side
    13,993.67x = 86,676,868.32
  5. Step 5: Solve for x
    x = 86,676,868.32/13,993.67
  6. Step 6: Final answer
    x = 6,194.01

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.