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Finding the Fourth Proportional to 14,051.40, 21,101.40 and 9,142.80

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Solution

The fourth proportional to 14,051.40, 21,101.40 and 9,142.80 is: 13,730.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,051.40 : 21,101.40 = 9,142.80 : x
  2. Step 2: Convert to fraction form
    14,051.40/21,101.40 = 9,142.80/x
  3. Step 3: Cross multiply
    14,051.40x = 21,101.40 × 9,142.80
  4. Step 4: Simplify right side
    14,051.40x = 192,925,879.92
  5. Step 5: Solve for x
    x = 192,925,879.92/14,051.40
  6. Step 6: Final answer
    x = 13,730.01

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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.