Home / 20,953.20-28,912.06-13,406.16

Finding the Fourth Proportional to 20,953.20, 28,912.06 and 13,406.16

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Solution

The fourth proportional to 20,953.20, 28,912.06 and 13,406.16 is: 18,498.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,953.20 : 28,912.06 = 13,406.16 : x
  2. Step 2: Convert to fraction form
    20,953.20/28,912.06 = 13,406.16/x
  3. Step 3: Cross multiply
    20,953.20x = 28,912.06 × 13,406.16
  4. Step 4: Simplify right side
    20,953.20x = 387,599,702.29
  5. Step 5: Solve for x
    x = 387,599,702.29/20,953.20
  6. Step 6: Final answer
    x = 18,498.35

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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.