Home / 20,852.20-31,102.61-19,400.68

Finding the Fourth Proportional to 20,852.20, 31,102.61 and 19,400.68

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Solution

The fourth proportional to 20,852.20, 31,102.61 and 19,400.68 is: 28,937.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,852.20 : 31,102.61 = 19,400.68 : x
  2. Step 2: Convert to fraction form
    20,852.20/31,102.61 = 19,400.68/x
  3. Step 3: Cross multiply
    20,852.20x = 31,102.61 × 19,400.68
  4. Step 4: Simplify right side
    20,852.20x = 603,411,783.77
  5. Step 5: Solve for x
    x = 603,411,783.77/20,852.20
  6. Step 6: Final answer
    x = 28,937.56

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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.