Home / 21,055.07-29,054.26-11,978.02

Finding the Fourth Proportional to 21,055.07, 29,054.26 and 11,978.02

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Solution

The fourth proportional to 21,055.07, 29,054.26 and 11,978.02 is: 16,528.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,055.07 : 29,054.26 = 11,978.02 : x
  2. Step 2: Convert to fraction form
    21,055.07/29,054.26 = 11,978.02/x
  3. Step 3: Cross multiply
    21,055.07x = 29,054.26 × 11,978.02
  4. Step 4: Simplify right side
    21,055.07x = 348,012,507.37
  5. Step 5: Solve for x
    x = 348,012,507.37/21,055.07
  6. Step 6: Final answer
    x = 16,528.68

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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.