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Finding the Fourth Proportional to 28,507.48, 42,760.26 and 12,914.20

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Solution

The fourth proportional to 28,507.48, 42,760.26 and 12,914.20 is: 19,370.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,507.48 : 42,760.26 = 12,914.20 : x
  2. Step 2: Convert to fraction form
    28,507.48/42,760.26 = 12,914.20/x
  3. Step 3: Cross multiply
    28,507.48x = 42,760.26 × 12,914.20
  4. Step 4: Simplify right side
    28,507.48x = 552,214,549.69
  5. Step 5: Solve for x
    x = 552,214,549.69/28,507.48
  6. Step 6: Final answer
    x = 19,370.87

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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.