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Finding the Fourth Proportional to 20,953.77, 28,922.34 and 12,461.88

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Solution

The fourth proportional to 20,953.77, 28,922.34 and 12,461.88 is: 17,201.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,953.77 : 28,922.34 = 12,461.88 : x
  2. Step 2: Convert to fraction form
    20,953.77/28,922.34 = 12,461.88/x
  3. Step 3: Cross multiply
    20,953.77x = 28,922.34 × 12,461.88
  4. Step 4: Simplify right side
    20,953.77x = 360,426,730.40
  5. Step 5: Solve for x
    x = 360,426,730.40/20,953.77
  6. Step 6: Final answer
    x = 17,201.04

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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.