Home / 20,872.14-28,803.66-11,312.04

Finding the Fourth Proportional to 20,872.14, 28,803.66 and 11,312.04

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Solution

The fourth proportional to 20,872.14, 28,803.66 and 11,312.04 is: 15,610.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,872.14 : 28,803.66 = 11,312.04 : x
  2. Step 2: Convert to fraction form
    20,872.14/28,803.66 = 11,312.04/x
  3. Step 3: Cross multiply
    20,872.14x = 28,803.66 × 11,312.04
  4. Step 4: Simplify right side
    20,872.14x = 325,828,154.07
  5. Step 5: Solve for x
    x = 325,828,154.07/20,872.14
  6. Step 6: Final answer
    x = 15,610.67

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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.