Home / 30,590.10-42,222.59-19,979.51

Finding the Fourth Proportional to 30,590.10, 42,222.59 and 19,979.51

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Solution

The fourth proportional to 30,590.10, 42,222.59 and 19,979.51 is: 27,577.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,590.10 : 42,222.59 = 19,979.51 : x
  2. Step 2: Convert to fraction form
    30,590.10/42,222.59 = 19,979.51/x
  3. Step 3: Cross multiply
    30,590.10x = 42,222.59 × 19,979.51
  4. Step 4: Simplify right side
    30,590.10x = 843,586,497.97
  5. Step 5: Solve for x
    x = 843,586,497.97/30,590.10
  6. Step 6: Final answer
    x = 27,577.11

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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.