Home / 13,447.74-18,557.19-7,778.28

Finding the Fourth Proportional to 13,447.74, 18,557.19 and 7,778.28

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Solution

The fourth proportional to 13,447.74, 18,557.19 and 7,778.28 is: 10,733.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,447.74 : 18,557.19 = 7,778.28 : x
  2. Step 2: Convert to fraction form
    13,447.74/18,557.19 = 7,778.28/x
  3. Step 3: Cross multiply
    13,447.74x = 18,557.19 × 7,778.28
  4. Step 4: Simplify right side
    13,447.74x = 144,343,019.83
  5. Step 5: Solve for x
    x = 144,343,019.83/13,447.74
  6. Step 6: Final answer
    x = 10,733.63

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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.