Home / 20,847.84-28,770.08-11,416.40

Finding the Fourth Proportional to 20,847.84, 28,770.08 and 11,416.40

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Solution

The fourth proportional to 20,847.84, 28,770.08 and 11,416.40 is: 15,754.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,847.84 : 28,770.08 = 11,416.40 : x
  2. Step 2: Convert to fraction form
    20,847.84/28,770.08 = 11,416.40/x
  3. Step 3: Cross multiply
    20,847.84x = 28,770.08 × 11,416.40
  4. Step 4: Simplify right side
    20,847.84x = 328,450,741.31
  5. Step 5: Solve for x
    x = 328,450,741.31/20,847.84
  6. Step 6: Final answer
    x = 15,754.67

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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.