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Finding the Fourth Proportional to 21,364.80, 29,482.56 and 12,412.56

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Solution

The fourth proportional to 21,364.80, 29,482.56 and 12,412.56 is: 17,128.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,364.80 : 29,482.56 = 12,412.56 : x
  2. Step 2: Convert to fraction form
    21,364.80/29,482.56 = 12,412.56/x
  3. Step 3: Cross multiply
    21,364.80x = 29,482.56 × 12,412.56
  4. Step 4: Simplify right side
    21,364.80x = 365,954,044.95
  5. Step 5: Solve for x
    x = 365,954,044.95/21,364.80
  6. Step 6: Final answer
    x = 17,128.83

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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.