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Finding the Fourth Proportional to 14,978.09, 20,668.55 and 8,602.65

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Solution

The fourth proportional to 14,978.09, 20,668.55 and 8,602.65 is: 11,870.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,978.09 : 20,668.55 = 8,602.65 : x
  2. Step 2: Convert to fraction form
    14,978.09/20,668.55 = 8,602.65/x
  3. Step 3: Cross multiply
    14,978.09x = 20,668.55 × 8,602.65
  4. Step 4: Simplify right side
    14,978.09x = 177,804,258.64
  5. Step 5: Solve for x
    x = 177,804,258.64/14,978.09
  6. Step 6: Final answer
    x = 11,870.96

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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.