Home / 19,111.70-28,667.55-13,279.70

Finding the Fourth Proportional to 19,111.70, 28,667.55 and 13,279.70

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Solution

The fourth proportional to 19,111.70, 28,667.55 and 13,279.70 is: 19,919.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,111.70 : 28,667.55 = 13,279.70 : x
  2. Step 2: Convert to fraction form
    19,111.70/28,667.55 = 13,279.70/x
  3. Step 3: Cross multiply
    19,111.70x = 28,667.55 × 13,279.70
  4. Step 4: Simplify right side
    19,111.70x = 380,696,463.74
  5. Step 5: Solve for x
    x = 380,696,463.74/19,111.70
  6. Step 6: Final answer
    x = 19,919.55

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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.