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Finding the Fourth Proportional to 14,153.78, 21,238.03 and 7,909.94

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Solution

The fourth proportional to 14,153.78, 21,238.03 and 7,909.94 is: 11,869.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,153.78 : 21,238.03 = 7,909.94 : x
  2. Step 2: Convert to fraction form
    14,153.78/21,238.03 = 7,909.94/x
  3. Step 3: Cross multiply
    14,153.78x = 21,238.03 × 7,909.94
  4. Step 4: Simplify right side
    14,153.78x = 167,991,543.02
  5. Step 5: Solve for x
    x = 167,991,543.02/14,153.78
  6. Step 6: Final answer
    x = 11,869.02

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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.