Home / 13,971.80-21,000.90-13,712.60

Finding the Fourth Proportional to 13,971.80, 21,000.90 and 13,712.60

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Solution

The fourth proportional to 13,971.80, 21,000.90 and 13,712.60 is: 20,611.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,971.80 : 21,000.90 = 13,712.60 : x
  2. Step 2: Convert to fraction form
    13,971.80/21,000.90 = 13,712.60/x
  3. Step 3: Cross multiply
    13,971.80x = 21,000.90 × 13,712.60
  4. Step 4: Simplify right side
    13,971.80x = 287,976,941.34
  5. Step 5: Solve for x
    x = 287,976,941.34/13,971.80
  6. Step 6: Final answer
    x = 20,611.30

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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.