Home / 15,511.14-21,405.60-9,539.28

Finding the Fourth Proportional to 15,511.14, 21,405.60 and 9,539.28

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Solution

The fourth proportional to 15,511.14, 21,405.60 and 9,539.28 is: 13,164.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,511.14 : 21,405.60 = 9,539.28 : x
  2. Step 2: Convert to fraction form
    15,511.14/21,405.60 = 9,539.28/x
  3. Step 3: Cross multiply
    15,511.14x = 21,405.60 × 9,539.28
  4. Step 4: Simplify right side
    15,511.14x = 204,194,011.97
  5. Step 5: Solve for x
    x = 204,194,011.97/15,511.14
  6. Step 6: Final answer
    x = 13,164.35

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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.