Home / 13,870.36-19,140.06-8,205.76

Finding the Fourth Proportional to 13,870.36, 19,140.06 and 8,205.76

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Solution

The fourth proportional to 13,870.36, 19,140.06 and 8,205.76 is: 11,323.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,870.36 : 19,140.06 = 8,205.76 : x
  2. Step 2: Convert to fraction form
    13,870.36/19,140.06 = 8,205.76/x
  3. Step 3: Cross multiply
    13,870.36x = 19,140.06 × 8,205.76
  4. Step 4: Simplify right side
    13,870.36x = 157,058,738.75
  5. Step 5: Solve for x
    x = 157,058,738.75/13,870.36
  6. Step 6: Final answer
    x = 11,323.34

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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.