Home / 20,970.55-28,929.82-12,467.85

Finding the Fourth Proportional to 20,970.55, 28,929.82 and 12,467.85

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Solution

The fourth proportional to 20,970.55, 28,929.82 and 12,467.85 is: 17,199.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,970.55 : 28,929.82 = 12,467.85 : x
  2. Step 2: Convert to fraction form
    20,970.55/28,929.82 = 12,467.85/x
  3. Step 3: Cross multiply
    20,970.55x = 28,929.82 × 12,467.85
  4. Step 4: Simplify right side
    20,970.55x = 360,692,656.29
  5. Step 5: Solve for x
    x = 360,692,656.29/20,970.55
  6. Step 6: Final answer
    x = 17,199.96

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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.