Home / 13,124.78-18,111.51-7,458.77

Finding the Fourth Proportional to 13,124.78, 18,111.51 and 7,458.77

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Solution

The fourth proportional to 13,124.78, 18,111.51 and 7,458.77 is: 10,292.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,124.78 : 18,111.51 = 7,458.77 : x
  2. Step 2: Convert to fraction form
    13,124.78/18,111.51 = 7,458.77/x
  3. Step 3: Cross multiply
    13,124.78x = 18,111.51 × 7,458.77
  4. Step 4: Simplify right side
    13,124.78x = 135,089,587.44
  5. Step 5: Solve for x
    x = 135,089,587.44/13,124.78
  6. Step 6: Final answer
    x = 10,292.71

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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.