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Finding the Fourth Proportional to 27,886.76, 38,483.86 and 15,311.50

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Solution

The fourth proportional to 27,886.76, 38,483.86 and 15,311.50 is: 21,129.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,886.76 : 38,483.86 = 15,311.50 : x
  2. Step 2: Convert to fraction form
    27,886.76/38,483.86 = 15,311.50/x
  3. Step 3: Cross multiply
    27,886.76x = 38,483.86 × 15,311.50
  4. Step 4: Simplify right side
    27,886.76x = 589,245,622.39
  5. Step 5: Solve for x
    x = 589,245,622.39/27,886.76
  6. Step 6: Final answer
    x = 21,129.94

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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.