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Finding the Fourth Proportional to 12,430.88, 18,648.48 and 7,235.36

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Solution

The fourth proportional to 12,430.88, 18,648.48 and 7,235.36 is: 10,854.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,430.88 : 18,648.48 = 7,235.36 : x
  2. Step 2: Convert to fraction form
    12,430.88/18,648.48 = 7,235.36/x
  3. Step 3: Cross multiply
    12,430.88x = 18,648.48 × 7,235.36
  4. Step 4: Simplify right side
    12,430.88x = 134,928,466.25
  5. Step 5: Solve for x
    x = 134,928,466.25/12,430.88
  6. Step 6: Final answer
    x = 10,854.30

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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.