Home / 30,590.33-42,215.06-18,489.16

Finding the Fourth Proportional to 30,590.33, 42,215.06 and 18,489.16

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Solution

The fourth proportional to 30,590.33, 42,215.06 and 18,489.16 is: 25,515.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,590.33 : 42,215.06 = 18,489.16 : x
  2. Step 2: Convert to fraction form
    30,590.33/42,215.06 = 18,489.16/x
  3. Step 3: Cross multiply
    30,590.33x = 42,215.06 × 18,489.16
  4. Step 4: Simplify right side
    30,590.33x = 780,520,939.43
  5. Step 5: Solve for x
    x = 780,520,939.43/30,590.33
  6. Step 6: Final answer
    x = 25,515.28

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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.