Home / 20,766.81-28,657.95-11,814.30

Finding the Fourth Proportional to 20,766.81, 28,657.95 and 11,814.30

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Solution

The fourth proportional to 20,766.81, 28,657.95 and 11,814.30 is: 16,303.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,766.81 : 28,657.95 = 11,814.30 : x
  2. Step 2: Convert to fraction form
    20,766.81/28,657.95 = 11,814.30/x
  3. Step 3: Cross multiply
    20,766.81x = 28,657.95 × 11,814.30
  4. Step 4: Simplify right side
    20,766.81x = 338,573,416.32
  5. Step 5: Solve for x
    x = 338,573,416.32/20,766.81
  6. Step 6: Final answer
    x = 16,303.58

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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.