Home / 13,860.70-19,128.90-7,894.24

Finding the Fourth Proportional to 13,860.70, 19,128.90 and 7,894.24

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Solution

The fourth proportional to 13,860.70, 19,128.90 and 7,894.24 is: 10,894.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,860.70 : 19,128.90 = 7,894.24 : x
  2. Step 2: Convert to fraction form
    13,860.70/19,128.90 = 7,894.24/x
  3. Step 3: Cross multiply
    13,860.70x = 19,128.90 × 7,894.24
  4. Step 4: Simplify right side
    13,860.70x = 151,008,127.54
  5. Step 5: Solve for x
    x = 151,008,127.54/13,860.70
  6. Step 6: Final answer
    x = 10,894.70

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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.