Home / 21,087.66-31,611.93-9,999.54

Finding the Fourth Proportional to 21,087.66, 31,611.93 and 9,999.54

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Solution

The fourth proportional to 21,087.66, 31,611.93 and 9,999.54 is: 14,990.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,087.66 : 31,611.93 = 9,999.54 : x
  2. Step 2: Convert to fraction form
    21,087.66/31,611.93 = 9,999.54/x
  3. Step 3: Cross multiply
    21,087.66x = 31,611.93 × 9,999.54
  4. Step 4: Simplify right side
    21,087.66x = 316,104,758.51
  5. Step 5: Solve for x
    x = 316,104,758.51/21,087.66
  6. Step 6: Final answer
    x = 14,990.03

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.