Home / 40,129.08-55,376.59-21,979.51

Finding the Fourth Proportional to 40,129.08, 55,376.59 and 21,979.51

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Solution

The fourth proportional to 40,129.08, 55,376.59 and 21,979.51 is: 30,330.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,129.08 : 55,376.59 = 21,979.51 : x
  2. Step 2: Convert to fraction form
    40,129.08/55,376.59 = 21,979.51/x
  3. Step 3: Cross multiply
    40,129.08x = 55,376.59 × 21,979.51
  4. Step 4: Simplify right side
    40,129.08x = 1,217,150,313.67
  5. Step 5: Solve for x
    x = 1,217,150,313.67/40,129.08
  6. Step 6: Final answer
    x = 30,330.88

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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.