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Finding the Fourth Proportional to 14,356.80, 21,495.24 and 7,321.68

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Solution

The fourth proportional to 14,356.80, 21,495.24 and 7,321.68 is: 10,962.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,356.80 : 21,495.24 = 7,321.68 : x
  2. Step 2: Convert to fraction form
    14,356.80/21,495.24 = 7,321.68/x
  3. Step 3: Cross multiply
    14,356.80x = 21,495.24 × 7,321.68
  4. Step 4: Simplify right side
    14,356.80x = 157,381,268.80
  5. Step 5: Solve for x
    x = 157,381,268.80/14,356.80
  6. Step 6: Final answer
    x = 10,962.14

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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.