Home / 20,854.63-28,779.39-11,423.53

Finding the Fourth Proportional to 20,854.63, 28,779.39 and 11,423.53

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Solution

The fourth proportional to 20,854.63, 28,779.39 and 11,423.53 is: 15,764.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,854.63 : 28,779.39 = 11,423.53 : x
  2. Step 2: Convert to fraction form
    20,854.63/28,779.39 = 11,423.53/x
  3. Step 3: Cross multiply
    20,854.63x = 28,779.39 × 11,423.53
  4. Step 4: Simplify right side
    20,854.63x = 328,762,081.15
  5. Step 5: Solve for x
    x = 328,762,081.15/20,854.63
  6. Step 6: Final answer
    x = 15,764.47

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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.