Home / 13,615.36-18,789-7,646.86

Finding the Fourth Proportional to 13,615.36, 18,789 and 7,646.86

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Solution

The fourth proportional to 13,615.36, 18,789 and 7,646.86 is: 10,552.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,615.36 : 18,789 = 7,646.86 : x
  2. Step 2: Convert to fraction form
    13,615.36/18,789 = 7,646.86/x
  3. Step 3: Cross multiply
    13,615.36x = 18,789 × 7,646.86
  4. Step 4: Simplify right side
    13,615.36x = 143,676,852.54
  5. Step 5: Solve for x
    x = 143,676,852.54/13,615.36
  6. Step 6: Final answer
    x = 10,552.56

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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.