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Finding the Fourth Proportional to 15,130, 20,865.04 and 9,079.32

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Solution

The fourth proportional to 15,130, 20,865.04 and 9,079.32 is: 12,520.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,130 : 20,865.04 = 9,079.32 : x
  2. Step 2: Convert to fraction form
    15,130/20,865.04 = 9,079.32/x
  3. Step 3: Cross multiply
    15,130x = 20,865.04 × 9,079.32
  4. Step 4: Simplify right side
    15,130x = 189,440,374.97
  5. Step 5: Solve for x
    x = 189,440,374.97/15,130
  6. Step 6: Final answer
    x = 12,520.84

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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.