Home / 20,984.24-28,960.30-15,669.84

Finding the Fourth Proportional to 20,984.24, 28,960.30 and 15,669.84

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Solution

The fourth proportional to 20,984.24, 28,960.30 and 15,669.84 is: 21,625.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,984.24 : 28,960.30 = 15,669.84 : x
  2. Step 2: Convert to fraction form
    20,984.24/28,960.30 = 15,669.84/x
  3. Step 3: Cross multiply
    20,984.24x = 28,960.30 × 15,669.84
  4. Step 4: Simplify right side
    20,984.24x = 453,803,267.35
  5. Step 5: Solve for x
    x = 453,803,267.35/20,984.24
  6. Step 6: Final answer
    x = 21,625.91

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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.