Home / 15,559.09-21,471.29-8,485.09

Finding the Fourth Proportional to 15,559.09, 21,471.29 and 8,485.09

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Solution

The fourth proportional to 15,559.09, 21,471.29 and 8,485.09 is: 11,709.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,559.09 : 21,471.29 = 8,485.09 : x
  2. Step 2: Convert to fraction form
    15,559.09/21,471.29 = 8,485.09/x
  3. Step 3: Cross multiply
    15,559.09x = 21,471.29 × 8,485.09
  4. Step 4: Simplify right side
    15,559.09x = 182,185,785.64
  5. Step 5: Solve for x
    x = 182,185,785.64/15,559.09
  6. Step 6: Final answer
    x = 11,709.28

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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.