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Finding the Fourth Proportional to 15,411, 21,310.92 and 14,714.81

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Solution

The fourth proportional to 15,411, 21,310.92 and 14,714.81 is: 20,348.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,411 : 21,310.92 = 14,714.81 : x
  2. Step 2: Convert to fraction form
    15,411/21,310.92 = 14,714.81/x
  3. Step 3: Cross multiply
    15,411x = 21,310.92 × 14,714.81
  4. Step 4: Simplify right side
    15,411x = 313,586,032.17
  5. Step 5: Solve for x
    x = 313,586,032.17/15,411
  6. Step 6: Final answer
    x = 20,348.19

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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.