Home / 15,511.36-21,406.24-8,888.64

Finding the Fourth Proportional to 15,511.36, 21,406.24 and 8,888.64

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Solution

The fourth proportional to 15,511.36, 21,406.24 and 8,888.64 is: 12,266.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,511.36 : 21,406.24 = 8,888.64 : x
  2. Step 2: Convert to fraction form
    15,511.36/21,406.24 = 8,888.64/x
  3. Step 3: Cross multiply
    15,511.36x = 21,406.24 × 8,888.64
  4. Step 4: Simplify right side
    15,511.36x = 190,272,361.11
  5. Step 5: Solve for x
    x = 190,272,361.11/15,511.36
  6. Step 6: Final answer
    x = 12,266.65

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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.