Home / 18,378.36-25,362.70-10,420.92

Finding the Fourth Proportional to 18,378.36, 25,362.70 and 10,420.92

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Solution

The fourth proportional to 18,378.36, 25,362.70 and 10,420.92 is: 14,381.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,378.36 : 25,362.70 = 10,420.92 : x
  2. Step 2: Convert to fraction form
    18,378.36/25,362.70 = 10,420.92/x
  3. Step 3: Cross multiply
    18,378.36x = 25,362.70 × 10,420.92
  4. Step 4: Simplify right side
    18,378.36x = 264,302,667.68
  5. Step 5: Solve for x
    x = 264,302,667.68/18,378.36
  6. Step 6: Final answer
    x = 14,381.19

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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.