Home / 21,054.15-29,056.77-15,739.74

Finding the Fourth Proportional to 21,054.15, 29,056.77 and 15,739.74

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Solution

The fourth proportional to 21,054.15, 29,056.77 and 15,739.74 is: 21,722.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,054.15 : 29,056.77 = 15,739.74 : x
  2. Step 2: Convert to fraction form
    21,054.15/29,056.77 = 15,739.74/x
  3. Step 3: Cross multiply
    21,054.15x = 29,056.77 × 15,739.74
  4. Step 4: Simplify right side
    21,054.15x = 457,346,005.04
  5. Step 5: Solve for x
    x = 457,346,005.04/21,054.15
  6. Step 6: Final answer
    x = 21,722.37

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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.