Home / 13,360.80-18,436.64-7,392.40

Finding the Fourth Proportional to 13,360.80, 18,436.64 and 7,392.40

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Solution

The fourth proportional to 13,360.80, 18,436.64 and 7,392.40 is: 10,200.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,360.80 : 18,436.64 = 7,392.40 : x
  2. Step 2: Convert to fraction form
    13,360.80/18,436.64 = 7,392.40/x
  3. Step 3: Cross multiply
    13,360.80x = 18,436.64 × 7,392.40
  4. Step 4: Simplify right side
    13,360.80x = 136,291,017.54
  5. Step 5: Solve for x
    x = 136,291,017.54/13,360.80
  6. Step 6: Final answer
    x = 10,200.81

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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.