Home / 15,511.77-21,399.39-9,220.50

Finding the Fourth Proportional to 15,511.77, 21,399.39 and 9,220.50

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Solution

The fourth proportional to 15,511.77, 21,399.39 and 9,220.50 is: 12,720.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,511.77 : 21,399.39 = 9,220.50 : x
  2. Step 2: Convert to fraction form
    15,511.77/21,399.39 = 9,220.50/x
  3. Step 3: Cross multiply
    15,511.77x = 21,399.39 × 9,220.50
  4. Step 4: Simplify right side
    15,511.77x = 197,313,075.50
  5. Step 5: Solve for x
    x = 197,313,075.50/15,511.77
  6. Step 6: Final answer
    x = 12,720.22

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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.