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Finding the Fourth Proportional to 14,062.80, 19,404.90 and 7,775.28

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Solution

The fourth proportional to 14,062.80, 19,404.90 and 7,775.28 is: 10,728.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,062.80 : 19,404.90 = 7,775.28 : x
  2. Step 2: Convert to fraction form
    14,062.80/19,404.90 = 7,775.28/x
  3. Step 3: Cross multiply
    14,062.80x = 19,404.90 × 7,775.28
  4. Step 4: Simplify right side
    14,062.80x = 150,878,530.87
  5. Step 5: Solve for x
    x = 150,878,530.87/14,062.80
  6. Step 6: Final answer
    x = 10,728.91

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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.