Home / 21,612.40-29,827.56-12,181.84

Finding the Fourth Proportional to 21,612.40, 29,827.56 and 12,181.84

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Solution

The fourth proportional to 21,612.40, 29,827.56 and 12,181.84 is: 16,812.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,612.40 : 29,827.56 = 12,181.84 : x
  2. Step 2: Convert to fraction form
    21,612.40/29,827.56 = 12,181.84/x
  3. Step 3: Cross multiply
    21,612.40x = 29,827.56 × 12,181.84
  4. Step 4: Simplify right side
    21,612.40x = 363,354,563.51
  5. Step 5: Solve for x
    x = 363,354,563.51/21,612.40
  6. Step 6: Final answer
    x = 16,812.32

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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.