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Finding the Fourth Proportional to 20,761.53, 28,642.19 and 14,477.55

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Solution

The fourth proportional to 20,761.53, 28,642.19 and 14,477.55 is: 19,972.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,761.53 : 28,642.19 = 14,477.55 : x
  2. Step 2: Convert to fraction form
    20,761.53/28,642.19 = 14,477.55/x
  3. Step 3: Cross multiply
    20,761.53x = 28,642.19 × 14,477.55
  4. Step 4: Simplify right side
    20,761.53x = 414,668,665.45
  5. Step 5: Solve for x
    x = 414,668,665.45/20,761.53
  6. Step 6: Final answer
    x = 19,972.93

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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.