Home / 13,364.32-18,440.40-7,777.12

Finding the Fourth Proportional to 13,364.32, 18,440.40 and 7,777.12

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Solution

The fourth proportional to 13,364.32, 18,440.40 and 7,777.12 is: 10,731.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,364.32 : 18,440.40 = 7,777.12 : x
  2. Step 2: Convert to fraction form
    13,364.32/18,440.40 = 7,777.12/x
  3. Step 3: Cross multiply
    13,364.32x = 18,440.40 × 7,777.12
  4. Step 4: Simplify right side
    13,364.32x = 143,413,203.65
  5. Step 5: Solve for x
    x = 143,413,203.65/13,364.32
  6. Step 6: Final answer
    x = 10,731.05

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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.