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Finding the Fourth Proportional to 17,420.80, 26,131.20 and 14,140.30

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Solution

The fourth proportional to 17,420.80, 26,131.20 and 14,140.30 is: 21,210.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,420.80 : 26,131.20 = 14,140.30 : x
  2. Step 2: Convert to fraction form
    17,420.80/26,131.20 = 14,140.30/x
  3. Step 3: Cross multiply
    17,420.80x = 26,131.20 × 14,140.30
  4. Step 4: Simplify right side
    17,420.80x = 369,503,007.36
  5. Step 5: Solve for x
    x = 369,503,007.36/17,420.80
  6. Step 6: Final answer
    x = 21,210.45

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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.