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Finding the Fourth Proportional to 13,703.76, 18,911.22 and 7,416.15

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Solution

The fourth proportional to 13,703.76, 18,911.22 and 7,416.15 is: 10,234.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,703.76 : 18,911.22 = 7,416.15 : x
  2. Step 2: Convert to fraction form
    13,703.76/18,911.22 = 7,416.15/x
  3. Step 3: Cross multiply
    13,703.76x = 18,911.22 × 7,416.15
  4. Step 4: Simplify right side
    13,703.76x = 140,248,444.20
  5. Step 5: Solve for x
    x = 140,248,444.20/13,703.76
  6. Step 6: Final answer
    x = 10,234.30

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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.