Home / 20,698.12-28,569.54-12,634.84

Finding the Fourth Proportional to 20,698.12, 28,569.54 and 12,634.84

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Solution

The fourth proportional to 20,698.12, 28,569.54 and 12,634.84 is: 17,439.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,698.12 : 28,569.54 = 12,634.84 : x
  2. Step 2: Convert to fraction form
    20,698.12/28,569.54 = 12,634.84/x
  3. Step 3: Cross multiply
    20,698.12x = 28,569.54 × 12,634.84
  4. Step 4: Simplify right side
    20,698.12x = 360,971,566.77
  5. Step 5: Solve for x
    x = 360,971,566.77/20,698.12
  6. Step 6: Final answer
    x = 17,439.82

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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.