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Finding the Fourth Proportional to 48,656.75, 72,985.13 and 11,720.75

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Solution

The fourth proportional to 48,656.75, 72,985.13 and 11,720.75 is: 17,581.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    48,656.75 : 72,985.13 = 11,720.75 : x
  2. Step 2: Convert to fraction form
    48,656.75/72,985.13 = 11,720.75/x
  3. Step 3: Cross multiply
    48,656.75x = 72,985.13 × 11,720.75
  4. Step 4: Simplify right side
    48,656.75x = 855,440,462.45
  5. Step 5: Solve for x
    x = 855,440,462.45/48,656.75
  6. Step 6: Final answer
    x = 17,581.13

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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.