Home / 20,810.28-28,710.16-12,838.68

Finding the Fourth Proportional to 20,810.28, 28,710.16 and 12,838.68

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Solution

The fourth proportional to 20,810.28, 28,710.16 and 12,838.68 is: 17,712.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,810.28 : 28,710.16 = 12,838.68 : x
  2. Step 2: Convert to fraction form
    20,810.28/28,710.16 = 12,838.68/x
  3. Step 3: Cross multiply
    20,810.28x = 28,710.16 × 12,838.68
  4. Step 4: Simplify right side
    20,810.28x = 368,600,556.99
  5. Step 5: Solve for x
    x = 368,600,556.99/20,810.28
  6. Step 6: Final answer
    x = 17,712.43

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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.