Home / 13,729.10-18,946.28-7,441.47

Finding the Fourth Proportional to 13,729.10, 18,946.28 and 7,441.47

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Solution

The fourth proportional to 13,729.10, 18,946.28 and 7,441.47 is: 10,269.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,729.10 : 18,946.28 = 7,441.47 : x
  2. Step 2: Convert to fraction form
    13,729.10/18,946.28 = 7,441.47/x
  3. Step 3: Cross multiply
    13,729.10x = 18,946.28 × 7,441.47
  4. Step 4: Simplify right side
    13,729.10x = 140,988,137.02
  5. Step 5: Solve for x
    x = 140,988,137.02/13,729.10
  6. Step 6: Final answer
    x = 10,269.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.