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Finding the Fourth Proportional to 18,703.74, 28,054.51 and 7,015.98

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Solution

The fourth proportional to 18,703.74, 28,054.51 and 7,015.98 is: 10,523.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,703.74 : 28,054.51 = 7,015.98 : x
  2. Step 2: Convert to fraction form
    18,703.74/28,054.51 = 7,015.98/x
  3. Step 3: Cross multiply
    18,703.74x = 28,054.51 × 7,015.98
  4. Step 4: Simplify right side
    18,703.74x = 196,829,881.07
  5. Step 5: Solve for x
    x = 196,829,881.07/18,703.74
  6. Step 6: Final answer
    x = 10,523.56

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.