Home / 21,449.71-29,602.55-12,956.05

Finding the Fourth Proportional to 21,449.71, 29,602.55 and 12,956.05

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Solution

The fourth proportional to 21,449.71, 29,602.55 and 12,956.05 is: 17,880.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,449.71 : 29,602.55 = 12,956.05 : x
  2. Step 2: Convert to fraction form
    21,449.71/29,602.55 = 12,956.05/x
  3. Step 3: Cross multiply
    21,449.71x = 29,602.55 × 12,956.05
  4. Step 4: Simplify right side
    21,449.71x = 383,531,905.13
  5. Step 5: Solve for x
    x = 383,531,905.13/21,449.71
  6. Step 6: Final answer
    x = 17,880.52

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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.