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Finding the Fourth Proportional to 28,668.66, 42,980.67 and 13,668.06

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Solution

The fourth proportional to 28,668.66, 42,980.67 and 13,668.06 is: 20,491.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,668.66 : 42,980.67 = 13,668.06 : x
  2. Step 2: Convert to fraction form
    28,668.66/42,980.67 = 13,668.06/x
  3. Step 3: Cross multiply
    28,668.66x = 42,980.67 × 13,668.06
  4. Step 4: Simplify right side
    28,668.66x = 587,462,376.40
  5. Step 5: Solve for x
    x = 587,462,376.40/28,668.66
  6. Step 6: Final answer
    x = 20,491.45

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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.