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Finding the Fourth Proportional to 28,553, 39,403.14 and 15,980.18

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Solution

The fourth proportional to 28,553, 39,403.14 and 15,980.18 is: 22,052.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,553 : 39,403.14 = 15,980.18 : x
  2. Step 2: Convert to fraction form
    28,553/39,403.14 = 15,980.18/x
  3. Step 3: Cross multiply
    28,553x = 39,403.14 × 15,980.18
  4. Step 4: Simplify right side
    28,553x = 629,669,269.77
  5. Step 5: Solve for x
    x = 629,669,269.77/28,553
  6. Step 6: Final answer
    x = 22,052.65

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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.