Home / 20,627.90-28,479.39-14,178.64

Finding the Fourth Proportional to 20,627.90, 28,479.39 and 14,178.64

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Solution

The fourth proportional to 20,627.90, 28,479.39 and 14,178.64 is: 19,575.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,627.90 : 28,479.39 = 14,178.64 : x
  2. Step 2: Convert to fraction form
    20,627.90/28,479.39 = 14,178.64/x
  3. Step 3: Cross multiply
    20,627.90x = 28,479.39 × 14,178.64
  4. Step 4: Simplify right side
    20,627.90x = 403,799,018.23
  5. Step 5: Solve for x
    x = 403,799,018.23/20,627.90
  6. Step 6: Final answer
    x = 19,575.38

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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.