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Finding the Fourth Proportional to 14,411.99, 19,890.36 and 8,445.94

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Solution

The fourth proportional to 14,411.99, 19,890.36 and 8,445.94 is: 11,656.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,411.99 : 19,890.36 = 8,445.94 : x
  2. Step 2: Convert to fraction form
    14,411.99/19,890.36 = 8,445.94/x
  3. Step 3: Cross multiply
    14,411.99x = 19,890.36 × 8,445.94
  4. Step 4: Simplify right side
    14,411.99x = 167,992,737.41
  5. Step 5: Solve for x
    x = 167,992,737.41/14,411.99
  6. Step 6: Final answer
    x = 11,656.45

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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.