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Finding the Fourth Proportional to 18,668.88, 27,973.08 and 12,430.80

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Solution

The fourth proportional to 18,668.88, 27,973.08 and 12,430.80 is: 18,626.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,668.88 : 27,973.08 = 12,430.80 : x
  2. Step 2: Convert to fraction form
    18,668.88/27,973.08 = 12,430.80/x
  3. Step 3: Cross multiply
    18,668.88x = 27,973.08 × 12,430.80
  4. Step 4: Simplify right side
    18,668.88x = 347,727,762.86
  5. Step 5: Solve for x
    x = 347,727,762.86/18,668.88
  6. Step 6: Final answer
    x = 18,626.06

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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.