Home / 30,279.68-41,781.30-18,943.70

Finding the Fourth Proportional to 30,279.68, 41,781.30 and 18,943.70

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Solution

The fourth proportional to 30,279.68, 41,781.30 and 18,943.70 is: 26,139.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,279.68 : 41,781.30 = 18,943.70 : x
  2. Step 2: Convert to fraction form
    30,279.68/41,781.30 = 18,943.70/x
  3. Step 3: Cross multiply
    30,279.68x = 41,781.30 × 18,943.70
  4. Step 4: Simplify right side
    30,279.68x = 791,492,412.81
  5. Step 5: Solve for x
    x = 791,492,412.81/30,279.68
  6. Step 6: Final answer
    x = 26,139.39

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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.