Home / 20,984.36-28,895.92-20,518.68

Finding the Fourth Proportional to 20,984.36, 28,895.92 and 20,518.68

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Solution

The fourth proportional to 20,984.36, 28,895.92 and 20,518.68 is: 28,254.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,984.36 : 28,895.92 = 20,518.68 : x
  2. Step 2: Convert to fraction form
    20,984.36/28,895.92 = 20,518.68/x
  3. Step 3: Cross multiply
    20,984.36x = 28,895.92 × 20,518.68
  4. Step 4: Simplify right side
    20,984.36x = 592,906,135.79
  5. Step 5: Solve for x
    x = 592,906,135.79/20,984.36
  6. Step 6: Final answer
    x = 28,254.67

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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.