Home / 20,488.98-28,266.21-12,528.66

Finding the Fourth Proportional to 20,488.98, 28,266.21 and 12,528.66

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Solution

The fourth proportional to 20,488.98, 28,266.21 and 12,528.66 is: 17,284.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,488.98 : 28,266.21 = 12,528.66 : x
  2. Step 2: Convert to fraction form
    20,488.98/28,266.21 = 12,528.66/x
  3. Step 3: Cross multiply
    20,488.98x = 28,266.21 × 12,528.66
  4. Step 4: Simplify right side
    20,488.98x = 354,137,734.58
  5. Step 5: Solve for x
    x = 354,137,734.58/20,488.98
  6. Step 6: Final answer
    x = 17,284.30

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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.