Home / 20,388.71-28,123.44-14,731.77

Finding the Fourth Proportional to 20,388.71, 28,123.44 and 14,731.77

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Solution

The fourth proportional to 20,388.71, 28,123.44 and 14,731.77 is: 20,320.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,388.71 : 28,123.44 = 14,731.77 : x
  2. Step 2: Convert to fraction form
    20,388.71/28,123.44 = 14,731.77/x
  3. Step 3: Cross multiply
    20,388.71x = 28,123.44 × 14,731.77
  4. Step 4: Simplify right side
    20,388.71x = 414,308,049.69
  5. Step 5: Solve for x
    x = 414,308,049.69/20,388.71
  6. Step 6: Final answer
    x = 20,320.47

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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.