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Finding the Fourth Proportional to 10,779.68, 16,130.56 and 8,913.44

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Solution

The fourth proportional to 10,779.68, 16,130.56 and 8,913.44 is: 13,337.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,779.68 : 16,130.56 = 8,913.44 : x
  2. Step 2: Convert to fraction form
    10,779.68/16,130.56 = 8,913.44/x
  3. Step 3: Cross multiply
    10,779.68x = 16,130.56 × 8,913.44
  4. Step 4: Simplify right side
    10,779.68x = 143,778,778.73
  5. Step 5: Solve for x
    x = 143,778,778.73/10,779.68
  6. Step 6: Final answer
    x = 13,337.94

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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.