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Finding the Fourth Proportional to 14,421.34, 19,903.44 and 8,454.48

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Solution

The fourth proportional to 14,421.34, 19,903.44 and 8,454.48 is: 11,668.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,421.34 : 19,903.44 = 8,454.48 : x
  2. Step 2: Convert to fraction form
    14,421.34/19,903.44 = 8,454.48/x
  3. Step 3: Cross multiply
    14,421.34x = 19,903.44 × 8,454.48
  4. Step 4: Simplify right side
    14,421.34x = 168,273,235.41
  5. Step 5: Solve for x
    x = 168,273,235.41/14,421.34
  6. Step 6: Final answer
    x = 11,668.35

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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.