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Finding the Fourth Proportional to 15,779.15, 23,661.79 and 5,911.50

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Solution

The fourth proportional to 15,779.15, 23,661.79 and 5,911.50 is: 8,864.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,779.15 : 23,661.79 = 5,911.50 : x
  2. Step 2: Convert to fraction form
    15,779.15/23,661.79 = 5,911.50/x
  3. Step 3: Cross multiply
    15,779.15x = 23,661.79 × 5,911.50
  4. Step 4: Simplify right side
    15,779.15x = 139,876,671.59
  5. Step 5: Solve for x
    x = 139,876,671.59/15,779.15
  6. Step 6: Final answer
    x = 8,864.65

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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.