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Finding the Fourth Proportional to 15,079.86, 20,810.90 and 8,365.10

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Solution

The fourth proportional to 15,079.86, 20,810.90 and 8,365.10 is: 11,544.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,079.86 : 20,810.90 = 8,365.10 : x
  2. Step 2: Convert to fraction form
    15,079.86/20,810.90 = 8,365.10/x
  3. Step 3: Cross multiply
    15,079.86x = 20,810.90 × 8,365.10
  4. Step 4: Simplify right side
    15,079.86x = 174,085,259.59
  5. Step 5: Solve for x
    x = 174,085,259.59/15,079.86
  6. Step 6: Final answer
    x = 11,544.22

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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.