Home / 54,314.32-81,421-21,056.08

Finding the Fourth Proportional to 54,314.32, 81,421 and 21,056.08

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Solution

The fourth proportional to 54,314.32, 81,421 and 21,056.08 is: 31,564.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,314.32 : 81,421 = 21,056.08 : x
  2. Step 2: Convert to fraction form
    54,314.32/81,421 = 21,056.08/x
  3. Step 3: Cross multiply
    54,314.32x = 81,421 × 21,056.08
  4. Step 4: Simplify right side
    54,314.32x = 1,714,407,089.68
  5. Step 5: Solve for x
    x = 1,714,407,089.68/54,314.32
  6. Step 6: Final answer
    x = 31,564.55

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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.