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Finding the Fourth Proportional to 15,559.36, 21,471.84 and 8,485.84

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Solution

The fourth proportional to 15,559.36, 21,471.84 and 8,485.84 is: 11,710.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,559.36 : 21,471.84 = 8,485.84 : x
  2. Step 2: Convert to fraction form
    15,559.36/21,471.84 = 8,485.84/x
  3. Step 3: Cross multiply
    15,559.36x = 21,471.84 × 8,485.84
  4. Step 4: Simplify right side
    15,559.36x = 182,206,598.75
  5. Step 5: Solve for x
    x = 182,206,598.75/15,559.36
  6. Step 6: Final answer
    x = 11,710.42

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Double scale
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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.