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Finding the Fourth Proportional to 9,648.40, 14,472.60 and 4,721.20

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Solution

The fourth proportional to 9,648.40, 14,472.60 and 4,721.20 is: 7,081.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,648.40 : 14,472.60 = 4,721.20 : x
  2. Step 2: Convert to fraction form
    9,648.40/14,472.60 = 4,721.20/x
  3. Step 3: Cross multiply
    9,648.40x = 14,472.60 × 4,721.20
  4. Step 4: Simplify right side
    9,648.40x = 68,328,039.12
  5. Step 5: Solve for x
    x = 68,328,039.12/9,648.40
  6. Step 6: Final answer
    x = 7,081.80

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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.