Home / 18,378.72-25,362.72-9,995.28

Finding the Fourth Proportional to 18,378.72, 25,362.72 and 9,995.28

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Solution

The fourth proportional to 18,378.72, 25,362.72 and 9,995.28 is: 13,793.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,378.72 : 25,362.72 = 9,995.28 : x
  2. Step 2: Convert to fraction form
    18,378.72/25,362.72 = 9,995.28/x
  3. Step 3: Cross multiply
    18,378.72x = 25,362.72 × 9,995.28
  4. Step 4: Simplify right side
    18,378.72x = 253,507,487.96
  5. Step 5: Solve for x
    x = 253,507,487.96/18,378.72
  6. Step 6: Final answer
    x = 13,793.53

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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.