Home / 20,958.98-28,915.18-12,001.66

Finding the Fourth Proportional to 20,958.98, 28,915.18 and 12,001.66

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Solution

The fourth proportional to 20,958.98, 28,915.18 and 12,001.66 is: 16,557.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,958.98 : 28,915.18 = 12,001.66 : x
  2. Step 2: Convert to fraction form
    20,958.98/28,915.18 = 12,001.66/x
  3. Step 3: Cross multiply
    20,958.98x = 28,915.18 × 12,001.66
  4. Step 4: Simplify right side
    20,958.98x = 347,030,159.20
  5. Step 5: Solve for x
    x = 347,030,159.20/20,958.98
  6. Step 6: Final answer
    x = 16,557.59

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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.