Home / 20,376.84-28,123.98-13,290.96

Finding the Fourth Proportional to 20,376.84, 28,123.98 and 13,290.96

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Solution

The fourth proportional to 20,376.84, 28,123.98 and 13,290.96 is: 18,344.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,376.84 : 28,123.98 = 13,290.96 : x
  2. Step 2: Convert to fraction form
    20,376.84/28,123.98 = 13,290.96/x
  3. Step 3: Cross multiply
    20,376.84x = 28,123.98 × 13,290.96
  4. Step 4: Simplify right side
    20,376.84x = 373,794,693.22
  5. Step 5: Solve for x
    x = 373,794,693.22/20,376.84
  6. Step 6: Final answer
    x = 18,344.10

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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.