Home / 9,896.80-13,657.29-5,420.45

Finding the Fourth Proportional to 9,896.80, 13,657.29 and 5,420.45

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Solution

The fourth proportional to 9,896.80, 13,657.29 and 5,420.45 is: 7,480.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,896.80 : 13,657.29 = 5,420.45 : x
  2. Step 2: Convert to fraction form
    9,896.80/13,657.29 = 5,420.45/x
  3. Step 3: Cross multiply
    9,896.80x = 13,657.29 × 5,420.45
  4. Step 4: Simplify right side
    9,896.80x = 74,028,630.48
  5. Step 5: Solve for x
    x = 74,028,630.48/9,896.80
  6. Step 6: Final answer
    x = 7,480.06

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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.