Home / 20,854.41-28,779.55-11,901.74

Finding the Fourth Proportional to 20,854.41, 28,779.55 and 11,901.74

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Solution

The fourth proportional to 20,854.41, 28,779.55 and 11,901.74 is: 16,424.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,854.41 : 28,779.55 = 11,901.74 : x
  2. Step 2: Convert to fraction form
    20,854.41/28,779.55 = 11,901.74/x
  3. Step 3: Cross multiply
    20,854.41x = 28,779.55 × 11,901.74
  4. Step 4: Simplify right side
    20,854.41x = 342,526,614.71
  5. Step 5: Solve for x
    x = 342,526,614.71/20,854.41
  6. Step 6: Final answer
    x = 16,424.66

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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.