Home / 18,165.96-25,065.72-13,688.28

Finding the Fourth Proportional to 18,165.96, 25,065.72 and 13,688.28

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Solution

The fourth proportional to 18,165.96, 25,065.72 and 13,688.28 is: 18,887.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,165.96 : 25,065.72 = 13,688.28 : x
  2. Step 2: Convert to fraction form
    18,165.96/25,065.72 = 13,688.28/x
  3. Step 3: Cross multiply
    18,165.96x = 25,065.72 × 13,688.28
  4. Step 4: Simplify right side
    18,165.96x = 343,106,593.76
  5. Step 5: Solve for x
    x = 343,106,593.76/18,165.96
  6. Step 6: Final answer
    x = 18,887.34

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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.