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Finding the Fourth Proportional to 11,859.12, 17,779.08 and 4,938.80

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Solution

The fourth proportional to 11,859.12, 17,779.08 and 4,938.80 is: 7,404.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,859.12 : 17,779.08 = 4,938.80 : x
  2. Step 2: Convert to fraction form
    11,859.12/17,779.08 = 4,938.80/x
  3. Step 3: Cross multiply
    11,859.12x = 17,779.08 × 4,938.80
  4. Step 4: Simplify right side
    11,859.12x = 87,807,320.30
  5. Step 5: Solve for x
    x = 87,807,320.30/11,859.12
  6. Step 6: Final answer
    x = 7,404.20

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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.