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Finding the Fourth Proportional to 28,679.20, 43,004.40 and 13,079.20

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Solution

The fourth proportional to 28,679.20, 43,004.40 and 13,079.20 is: 19,612.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,679.20 : 43,004.40 = 13,079.20 : x
  2. Step 2: Convert to fraction form
    28,679.20/43,004.40 = 13,079.20/x
  3. Step 3: Cross multiply
    28,679.20x = 43,004.40 × 13,079.20
  4. Step 4: Simplify right side
    28,679.20x = 562,463,148.48
  5. Step 5: Solve for x
    x = 562,463,148.48/28,679.20
  6. Step 6: Final answer
    x = 19,612.23

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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.