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Finding the Fourth Proportional to 38,992.24, 53,809.16 and 21,087.24

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Solution

The fourth proportional to 38,992.24, 53,809.16 and 21,087.24 is: 29,100.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,992.24 : 53,809.16 = 21,087.24 : x
  2. Step 2: Convert to fraction form
    38,992.24/53,809.16 = 21,087.24/x
  3. Step 3: Cross multiply
    38,992.24x = 53,809.16 × 21,087.24
  4. Step 4: Simplify right side
    38,992.24x = 1,134,686,482.51
  5. Step 5: Solve for x
    x = 1,134,686,482.51/38,992.24
  6. Step 6: Final answer
    x = 29,100.32

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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.