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Finding the Fourth Proportional to 18,071.20, 27,106.80 and 11,870.40

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Solution

The fourth proportional to 18,071.20, 27,106.80 and 11,870.40 is: 17,805.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,071.20 : 27,106.80 = 11,870.40 : x
  2. Step 2: Convert to fraction form
    18,071.20/27,106.80 = 11,870.40/x
  3. Step 3: Cross multiply
    18,071.20x = 27,106.80 × 11,870.40
  4. Step 4: Simplify right side
    18,071.20x = 321,768,558.72
  5. Step 5: Solve for x
    x = 321,768,558.72/18,071.20
  6. Step 6: Final answer
    x = 17,805.60

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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.