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Finding the Fourth Proportional to 7,420.53, 11,130.72 and 1,873.76

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Solution

The fourth proportional to 7,420.53, 11,130.72 and 1,873.76 is: 2,810.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,420.53 : 11,130.72 = 1,873.76 : x
  2. Step 2: Convert to fraction form
    7,420.53/11,130.72 = 1,873.76/x
  3. Step 3: Cross multiply
    7,420.53x = 11,130.72 × 1,873.76
  4. Step 4: Simplify right side
    7,420.53x = 20,856,297.91
  5. Step 5: Solve for x
    x = 20,856,297.91/7,420.53
  6. Step 6: Final answer
    x = 2,810.62

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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.