Home / 20,586.96-28,410-11,155.56

Finding the Fourth Proportional to 20,586.96, 28,410 and 11,155.56

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Solution

The fourth proportional to 20,586.96, 28,410 and 11,155.56 is: 15,394.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,586.96 : 28,410 = 11,155.56 : x
  2. Step 2: Convert to fraction form
    20,586.96/28,410 = 11,155.56/x
  3. Step 3: Cross multiply
    20,586.96x = 28,410 × 11,155.56
  4. Step 4: Simplify right side
    20,586.96x = 316,929,459.60
  5. Step 5: Solve for x
    x = 316,929,459.60/20,586.96
  6. Step 6: Final answer
    x = 15,394.67

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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.