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Finding the Fourth Proportional to 14,510.60, 21,765.90 and 7,119.80

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Solution

The fourth proportional to 14,510.60, 21,765.90 and 7,119.80 is: 10,679.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,510.60 : 21,765.90 = 7,119.80 : x
  2. Step 2: Convert to fraction form
    14,510.60/21,765.90 = 7,119.80/x
  3. Step 3: Cross multiply
    14,510.60x = 21,765.90 × 7,119.80
  4. Step 4: Simplify right side
    14,510.60x = 154,968,854.82
  5. Step 5: Solve for x
    x = 154,968,854.82/14,510.60
  6. Step 6: Final answer
    x = 10,679.70

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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.