Home / 20,480.53-28,271.84-13,770.05

Finding the Fourth Proportional to 20,480.53, 28,271.84 and 13,770.05

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Solution

The fourth proportional to 20,480.53, 28,271.84 and 13,770.05 is: 19,008.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,480.53 : 28,271.84 = 13,770.05 : x
  2. Step 2: Convert to fraction form
    20,480.53/28,271.84 = 13,770.05/x
  3. Step 3: Cross multiply
    20,480.53x = 28,271.84 × 13,770.05
  4. Step 4: Simplify right side
    20,480.53x = 389,304,579.71
  5. Step 5: Solve for x
    x = 389,304,579.71/20,480.53
  6. Step 6: Final answer
    x = 19,008.52

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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.