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Finding the Fourth Proportional to 20,597.80, 28,435.50 and 13,051.96

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Solution

The fourth proportional to 20,597.80, 28,435.50 and 13,051.96 is: 18,018.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,597.80 : 28,435.50 = 13,051.96 : x
  2. Step 2: Convert to fraction form
    20,597.80/28,435.50 = 13,051.96/x
  3. Step 3: Cross multiply
    20,597.80x = 28,435.50 × 13,051.96
  4. Step 4: Simplify right side
    20,597.80x = 371,139,008.58
  5. Step 5: Solve for x
    x = 371,139,008.58/20,597.80
  6. Step 6: Final answer
    x = 18,018.38

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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.