Home / 20,406.63-28,154.06-12,853.59

Finding the Fourth Proportional to 20,406.63, 28,154.06 and 12,853.59

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Solution

The fourth proportional to 20,406.63, 28,154.06 and 12,853.59 is: 17,733.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,406.63 : 28,154.06 = 12,853.59 : x
  2. Step 2: Convert to fraction form
    20,406.63/28,154.06 = 12,853.59/x
  3. Step 3: Cross multiply
    20,406.63x = 28,154.06 × 12,853.59
  4. Step 4: Simplify right side
    20,406.63x = 361,880,539.04
  5. Step 5: Solve for x
    x = 361,880,539.04/20,406.63
  6. Step 6: Final answer
    x = 17,733.48

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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.