Home / 20,701.99-28,564.95-12,206.78

Finding the Fourth Proportional to 20,701.99, 28,564.95 and 12,206.78

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Solution

The fourth proportional to 20,701.99, 28,564.95 and 12,206.78 is: 16,843.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,701.99 : 28,564.95 = 12,206.78 : x
  2. Step 2: Convert to fraction form
    20,701.99/28,564.95 = 12,206.78/x
  3. Step 3: Cross multiply
    20,701.99x = 28,564.95 × 12,206.78
  4. Step 4: Simplify right side
    20,701.99x = 348,686,060.36
  5. Step 5: Solve for x
    x = 348,686,060.36/20,701.99
  6. Step 6: Final answer
    x = 16,843.12

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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.