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Finding the Fourth Proportional to 28,937.60, 43,408.80 and 9,215.60

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Solution

The fourth proportional to 28,937.60, 43,408.80 and 9,215.60 is: 13,824.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,937.60 : 43,408.80 = 9,215.60 : x
  2. Step 2: Convert to fraction form
    28,937.60/43,408.80 = 9,215.60/x
  3. Step 3: Cross multiply
    28,937.60x = 43,408.80 × 9,215.60
  4. Step 4: Simplify right side
    28,937.60x = 400,038,137.28
  5. Step 5: Solve for x
    x = 400,038,137.28/28,937.60
  6. Step 6: Final answer
    x = 13,824.16

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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.