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Finding the Fourth Proportional to 11,292.40, 16,940.40 and 4,715.20

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Solution

The fourth proportional to 11,292.40, 16,940.40 and 4,715.20 is: 7,073.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,292.40 : 16,940.40 = 4,715.20 : x
  2. Step 2: Convert to fraction form
    11,292.40/16,940.40 = 4,715.20/x
  3. Step 3: Cross multiply
    11,292.40x = 16,940.40 × 4,715.20
  4. Step 4: Simplify right side
    11,292.40x = 79,877,374.08
  5. Step 5: Solve for x
    x = 79,877,374.08/11,292.40
  6. Step 6: Final answer
    x = 7,073.55

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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.