Home / 13,862.70-19,128.60-7,894.08

Finding the Fourth Proportional to 13,862.70, 19,128.60 and 7,894.08

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Solution

The fourth proportional to 13,862.70, 19,128.60 and 7,894.08 is: 10,892.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,862.70 : 19,128.60 = 7,894.08 : x
  2. Step 2: Convert to fraction form
    13,862.70/19,128.60 = 7,894.08/x
  3. Step 3: Cross multiply
    13,862.70x = 19,128.60 × 7,894.08
  4. Step 4: Simplify right side
    13,862.70x = 151,002,698.69
  5. Step 5: Solve for x
    x = 151,002,698.69/13,862.70
  6. Step 6: Final answer
    x = 10,892.73

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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.