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Finding the Fourth Proportional to 14,004.80, 21,007.20 and 11,931.20

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Solution

The fourth proportional to 14,004.80, 21,007.20 and 11,931.20 is: 17,896.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,004.80 : 21,007.20 = 11,931.20 : x
  2. Step 2: Convert to fraction form
    14,004.80/21,007.20 = 11,931.20/x
  3. Step 3: Cross multiply
    14,004.80x = 21,007.20 × 11,931.20
  4. Step 4: Simplify right side
    14,004.80x = 250,641,104.64
  5. Step 5: Solve for x
    x = 250,641,104.64/14,004.80
  6. Step 6: Final answer
    x = 17,896.80

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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.