Home / 20,380.50-28,116.18-14,417.28

Finding the Fourth Proportional to 20,380.50, 28,116.18 and 14,417.28

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Solution

The fourth proportional to 20,380.50, 28,116.18 and 14,417.28 is: 19,889.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,380.50 : 28,116.18 = 14,417.28 : x
  2. Step 2: Convert to fraction form
    20,380.50/28,116.18 = 14,417.28/x
  3. Step 3: Cross multiply
    20,380.50x = 28,116.18 × 14,417.28
  4. Step 4: Simplify right side
    20,380.50x = 405,358,839.59
  5. Step 5: Solve for x
    x = 405,358,839.59/20,380.50
  6. Step 6: Final answer
    x = 19,889.54

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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.