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Finding the Fourth Proportional to 33,315.51, 45,978.14 and 18,979.83

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Solution

The fourth proportional to 33,315.51, 45,978.14 and 18,979.83 is: 26,193.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    33,315.51 : 45,978.14 = 18,979.83 : x
  2. Step 2: Convert to fraction form
    33,315.51/45,978.14 = 18,979.83/x
  3. Step 3: Cross multiply
    33,315.51x = 45,978.14 × 18,979.83
  4. Step 4: Simplify right side
    33,315.51x = 872,657,186.02
  5. Step 5: Solve for x
    x = 872,657,186.02/33,315.51
  6. Step 6: Final answer
    x = 26,193.72

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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.