Home / 15,584.86-21,507-8,511.29

Finding the Fourth Proportional to 15,584.86, 21,507 and 8,511.29

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Solution

The fourth proportional to 15,584.86, 21,507 and 8,511.29 is: 11,745.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,584.86 : 21,507 = 8,511.29 : x
  2. Step 2: Convert to fraction form
    15,584.86/21,507 = 8,511.29/x
  3. Step 3: Cross multiply
    15,584.86x = 21,507 × 8,511.29
  4. Step 4: Simplify right side
    15,584.86x = 183,052,206.50
  5. Step 5: Solve for x
    x = 183,052,206.50/15,584.86
  6. Step 6: Final answer
    x = 11,745.51

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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.