Home / 15,495.28-21,383.06-8,783.08

Finding the Fourth Proportional to 15,495.28, 21,383.06 and 8,783.08

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Solution

The fourth proportional to 15,495.28, 21,383.06 and 8,783.08 is: 12,120.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,495.28 : 21,383.06 = 8,783.08 : x
  2. Step 2: Convert to fraction form
    15,495.28/21,383.06 = 8,783.08/x
  3. Step 3: Cross multiply
    15,495.28x = 21,383.06 × 8,783.08
  4. Step 4: Simplify right side
    15,495.28x = 187,809,126.62
  5. Step 5: Solve for x
    x = 187,809,126.62/15,495.28
  6. Step 6: Final answer
    x = 12,120.41

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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.