Home / 20,368.12-28,069.96-15,884.80

Finding the Fourth Proportional to 20,368.12, 28,069.96 and 15,884.80

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Solution

The fourth proportional to 20,368.12, 28,069.96 and 15,884.80 is: 21,891.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,368.12 : 28,069.96 = 15,884.80 : x
  2. Step 2: Convert to fraction form
    20,368.12/28,069.96 = 15,884.80/x
  3. Step 3: Cross multiply
    20,368.12x = 28,069.96 × 15,884.80
  4. Step 4: Simplify right side
    20,368.12x = 445,885,700.61
  5. Step 5: Solve for x
    x = 445,885,700.61/20,368.12
  6. Step 6: Final answer
    x = 21,891.35

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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.