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Finding the Fourth Proportional to 51,015.88, 70,401.54 and 28,659.88

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Solution

The fourth proportional to 51,015.88, 70,401.54 and 28,659.88 is: 39,550.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,015.88 : 70,401.54 = 28,659.88 : x
  2. Step 2: Convert to fraction form
    51,015.88/70,401.54 = 28,659.88/x
  3. Step 3: Cross multiply
    51,015.88x = 70,401.54 × 28,659.88
  4. Step 4: Simplify right side
    51,015.88x = 2,017,699,688.22
  5. Step 5: Solve for x
    x = 2,017,699,688.22/51,015.88
  6. Step 6: Final answer
    x = 39,550.42

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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.