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Finding the Fourth Proportional to 18,586.18, 27,858.06 and 7,485.76

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Solution

The fourth proportional to 18,586.18, 27,858.06 and 7,485.76 is: 11,220.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,586.18 : 27,858.06 = 7,485.76 : x
  2. Step 2: Convert to fraction form
    18,586.18/27,858.06 = 7,485.76/x
  3. Step 3: Cross multiply
    18,586.18x = 27,858.06 × 7,485.76
  4. Step 4: Simplify right side
    18,586.18x = 208,538,751.23
  5. Step 5: Solve for x
    x = 208,538,751.23/18,586.18
  6. Step 6: Final answer
    x = 11,220.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.