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Finding the Fourth Proportional to 20,873.96, 28,805.16 and 12,495.08

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Solution

The fourth proportional to 20,873.96, 28,805.16 and 12,495.08 is: 17,242.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,873.96 : 28,805.16 = 12,495.08 : x
  2. Step 2: Convert to fraction form
    20,873.96/28,805.16 = 12,495.08/x
  3. Step 3: Cross multiply
    20,873.96x = 28,805.16 × 12,495.08
  4. Step 4: Simplify right side
    20,873.96x = 359,922,778.61
  5. Step 5: Solve for x
    x = 359,922,778.61/20,873.96
  6. Step 6: Final answer
    x = 17,242.67

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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.