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Finding the Fourth Proportional to 28,059.80, 38,722.48 and 15,484.54

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Solution

The fourth proportional to 28,059.80, 38,722.48 and 15,484.54 is: 21,368.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,059.80 : 38,722.48 = 15,484.54 : x
  2. Step 2: Convert to fraction form
    28,059.80/38,722.48 = 15,484.54/x
  3. Step 3: Cross multiply
    28,059.80x = 38,722.48 × 15,484.54
  4. Step 4: Simplify right side
    28,059.80x = 599,599,790.46
  5. Step 5: Solve for x
    x = 599,599,790.46/28,059.80
  6. Step 6: Final answer
    x = 21,368.64

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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.