Home / 15,362.72-21,203.60-9,977.64

Finding the Fourth Proportional to 15,362.72, 21,203.60 and 9,977.64

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Solution

The fourth proportional to 15,362.72, 21,203.60 and 9,977.64 is: 13,771.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,362.72 : 21,203.60 = 9,977.64 : x
  2. Step 2: Convert to fraction form
    15,362.72/21,203.60 = 9,977.64/x
  3. Step 3: Cross multiply
    15,362.72x = 21,203.60 × 9,977.64
  4. Step 4: Simplify right side
    15,362.72x = 211,561,887.50
  5. Step 5: Solve for x
    x = 211,561,887.50/15,362.72
  6. Step 6: Final answer
    x = 13,771.12

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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.