Home / 20,649.69-28,501.10-13,576.77

Finding the Fourth Proportional to 20,649.69, 28,501.10 and 13,576.77

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Solution

The fourth proportional to 20,649.69, 28,501.10 and 13,576.77 is: 18,738.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,649.69 : 28,501.10 = 13,576.77 : x
  2. Step 2: Convert to fraction form
    20,649.69/28,501.10 = 13,576.77/x
  3. Step 3: Cross multiply
    20,649.69x = 28,501.10 × 13,576.77
  4. Step 4: Simplify right side
    20,649.69x = 386,952,811.56
  5. Step 5: Solve for x
    x = 386,952,811.56/20,649.69
  6. Step 6: Final answer
    x = 18,738.92

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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.