Home / 30,236.78-45,279.74-19,109.90

Finding the Fourth Proportional to 30,236.78, 45,279.74 and 19,109.90

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Solution

The fourth proportional to 30,236.78, 45,279.74 and 19,109.90 is: 28,617.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,236.78 : 45,279.74 = 19,109.90 : x
  2. Step 2: Convert to fraction form
    30,236.78/45,279.74 = 19,109.90/x
  3. Step 3: Cross multiply
    30,236.78x = 45,279.74 × 19,109.90
  4. Step 4: Simplify right side
    30,236.78x = 865,291,303.43
  5. Step 5: Solve for x
    x = 865,291,303.43/30,236.78
  6. Step 6: Final answer
    x = 28,617.18

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.