Home / 20,709.56-28,586.04-12,211.40

Finding the Fourth Proportional to 20,709.56, 28,586.04 and 12,211.40

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Solution

The fourth proportional to 20,709.56, 28,586.04 and 12,211.40 is: 16,855.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,709.56 : 28,586.04 = 12,211.40 : x
  2. Step 2: Convert to fraction form
    20,709.56/28,586.04 = 12,211.40/x
  3. Step 3: Cross multiply
    20,709.56x = 28,586.04 × 12,211.40
  4. Step 4: Simplify right side
    20,709.56x = 349,075,568.86
  5. Step 5: Solve for x
    x = 349,075,568.86/20,709.56
  6. Step 6: Final answer
    x = 16,855.77

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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.