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Finding the Fourth Proportional to 18,697.75, 28,038.40 and 7,002.76

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Solution

The fourth proportional to 18,697.75, 28,038.40 and 7,002.76 is: 10,501.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,697.75 : 28,038.40 = 7,002.76 : x
  2. Step 2: Convert to fraction form
    18,697.75/28,038.40 = 7,002.76/x
  3. Step 3: Cross multiply
    18,697.75x = 28,038.40 × 7,002.76
  4. Step 4: Simplify right side
    18,697.75x = 196,346,185.98
  5. Step 5: Solve for x
    x = 196,346,185.98/18,697.75
  6. Step 6: Final answer
    x = 10,501.06

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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.