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Finding the Fourth Proportional to 14,509.90, 20,022.15 and 8,541.21

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Solution

The fourth proportional to 14,509.90, 20,022.15 and 8,541.21 is: 11,785.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,509.90 : 20,022.15 = 8,541.21 : x
  2. Step 2: Convert to fraction form
    14,509.90/20,022.15 = 8,541.21/x
  3. Step 3: Cross multiply
    14,509.90x = 20,022.15 × 8,541.21
  4. Step 4: Simplify right side
    14,509.90x = 171,013,387.80
  5. Step 5: Solve for x
    x = 171,013,387.80/14,509.90
  6. Step 6: Final answer
    x = 11,785.98

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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.