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Finding the Fourth Proportional to 14,472.54, 19,970.96 and 8,421.84

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Solution

The fourth proportional to 14,472.54, 19,970.96 and 8,421.84 is: 11,621.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,472.54 : 19,970.96 = 8,421.84 : x
  2. Step 2: Convert to fraction form
    14,472.54/19,970.96 = 8,421.84/x
  3. Step 3: Cross multiply
    14,472.54x = 19,970.96 × 8,421.84
  4. Step 4: Simplify right side
    14,472.54x = 168,192,229.77
  5. Step 5: Solve for x
    x = 168,192,229.77/14,472.54
  6. Step 6: Final answer
    x = 11,621.47

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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.