Home / 20,688.39-30,798.58-20,565.37

Finding the Fourth Proportional to 20,688.39, 30,798.58 and 20,565.37

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Solution

The fourth proportional to 20,688.39, 30,798.58 and 20,565.37 is: 30,615.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,688.39 : 30,798.58 = 20,565.37 : x
  2. Step 2: Convert to fraction form
    20,688.39/30,798.58 = 20,565.37/x
  3. Step 3: Cross multiply
    20,688.39x = 30,798.58 × 20,565.37
  4. Step 4: Simplify right side
    20,688.39x = 633,384,193.17
  5. Step 5: Solve for x
    x = 633,384,193.17/20,688.39
  6. Step 6: Final answer
    x = 30,615.44

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.