Home / 20,681.41-28,539.75-11,729.74

Finding the Fourth Proportional to 20,681.41, 28,539.75 and 11,729.74

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Solution

The fourth proportional to 20,681.41, 28,539.75 and 11,729.74 is: 16,186.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,681.41 : 28,539.75 = 11,729.74 : x
  2. Step 2: Convert to fraction form
    20,681.41/28,539.75 = 11,729.74/x
  3. Step 3: Cross multiply
    20,681.41x = 28,539.75 × 11,729.74
  4. Step 4: Simplify right side
    20,681.41x = 334,763,847.17
  5. Step 5: Solve for x
    x = 334,763,847.17/20,681.41
  6. Step 6: Final answer
    x = 16,186.70

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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.