Home / 14,520.90-21,785.40-7,125.60

Finding the Fourth Proportional to 14,520.90, 21,785.40 and 7,125.60

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Solution

The fourth proportional to 14,520.90, 21,785.40 and 7,125.60 is: 10,690.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,520.90 : 21,785.40 = 7,125.60 : x
  2. Step 2: Convert to fraction form
    14,520.90/21,785.40 = 7,125.60/x
  3. Step 3: Cross multiply
    14,520.90x = 21,785.40 × 7,125.60
  4. Step 4: Simplify right side
    14,520.90x = 155,234,046.24
  5. Step 5: Solve for x
    x = 155,234,046.24/14,520.90
  6. Step 6: Final answer
    x = 10,690.39

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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.