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Finding the Fourth Proportional to 13,870.80, 20,808.90 and 4,010.40

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Solution

The fourth proportional to 13,870.80, 20,808.90 and 4,010.40 is: 6,016.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,870.80 : 20,808.90 = 4,010.40 : x
  2. Step 2: Convert to fraction form
    13,870.80/20,808.90 = 4,010.40/x
  3. Step 3: Cross multiply
    13,870.80x = 20,808.90 × 4,010.40
  4. Step 4: Simplify right side
    13,870.80x = 83,452,012.56
  5. Step 5: Solve for x
    x = 83,452,012.56/13,870.80
  6. Step 6: Final answer
    x = 6,016.38

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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.