Home / 10,921.90-15,077.94-7,355.60

Finding the Fourth Proportional to 10,921.90, 15,077.94 and 7,355.60

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Solution

The fourth proportional to 10,921.90, 15,077.94 and 7,355.60 is: 10,154.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,921.90 : 15,077.94 = 7,355.60 : x
  2. Step 2: Convert to fraction form
    10,921.90/15,077.94 = 7,355.60/x
  3. Step 3: Cross multiply
    10,921.90x = 15,077.94 × 7,355.60
  4. Step 4: Simplify right side
    10,921.90x = 110,907,295.46
  5. Step 5: Solve for x
    x = 110,907,295.46/10,921.90
  6. Step 6: Final answer
    x = 10,154.58

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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.