Home / 13,862.85-19,128.05-7,894.39

Finding the Fourth Proportional to 13,862.85, 19,128.05 and 7,894.39

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Solution

The fourth proportional to 13,862.85, 19,128.05 and 7,894.39 is: 10,892.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,862.85 : 19,128.05 = 7,894.39 : x
  2. Step 2: Convert to fraction form
    13,862.85/19,128.05 = 7,894.39/x
  3. Step 3: Cross multiply
    13,862.85x = 19,128.05 × 7,894.39
  4. Step 4: Simplify right side
    13,862.85x = 151,004,211.02
  5. Step 5: Solve for x
    x = 151,004,211.02/13,862.85
  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.