Home / 28,690.35-39,581.60-21,154.52

Finding the Fourth Proportional to 28,690.35, 39,581.60 and 21,154.52

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Solution

The fourth proportional to 28,690.35, 39,581.60 and 21,154.52 is: 29,185.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,690.35 : 39,581.60 = 21,154.52 : x
  2. Step 2: Convert to fraction form
    28,690.35/39,581.60 = 21,154.52/x
  3. Step 3: Cross multiply
    28,690.35x = 39,581.60 × 21,154.52
  4. Step 4: Simplify right side
    28,690.35x = 837,329,445.15
  5. Step 5: Solve for x
    x = 837,329,445.15/28,690.35
  6. Step 6: Final answer
    x = 29,185.06

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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.