Home / 20,861.84-28,789.32-11,430.32

Finding the Fourth Proportional to 20,861.84, 28,789.32 and 11,430.32

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Solution

The fourth proportional to 20,861.84, 28,789.32 and 11,430.32 is: 15,773.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,861.84 : 28,789.32 = 11,430.32 : x
  2. Step 2: Convert to fraction form
    20,861.84/28,789.32 = 11,430.32/x
  3. Step 3: Cross multiply
    20,861.84x = 28,789.32 × 11,430.32
  4. Step 4: Simplify right side
    20,861.84x = 329,071,140.18
  5. Step 5: Solve for x
    x = 329,071,140.18/20,861.84
  6. Step 6: Final answer
    x = 15,773.83

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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.