Home / 20,957.84-28,920.74-11,524.60

Finding the Fourth Proportional to 20,957.84, 28,920.74 and 11,524.60

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Solution

The fourth proportional to 20,957.84, 28,920.74 and 11,524.60 is: 15,903.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,957.84 : 28,920.74 = 11,524.60 : x
  2. Step 2: Convert to fraction form
    20,957.84/28,920.74 = 11,524.60/x
  3. Step 3: Cross multiply
    20,957.84x = 28,920.74 × 11,524.60
  4. Step 4: Simplify right side
    20,957.84x = 333,299,960.20
  5. Step 5: Solve for x
    x = 333,299,960.20/20,957.84
  6. Step 6: Final answer
    x = 15,903.35

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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.