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Finding the Fourth Proportional to 18,714.53, 28,055.28 and 7,630.49

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Solution

The fourth proportional to 18,714.53, 28,055.28 and 7,630.49 is: 11,439.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,714.53 : 28,055.28 = 7,630.49 : x
  2. Step 2: Convert to fraction form
    18,714.53/28,055.28 = 7,630.49/x
  3. Step 3: Cross multiply
    18,714.53x = 28,055.28 × 7,630.49
  4. Step 4: Simplify right side
    18,714.53x = 214,075,393.21
  5. Step 5: Solve for x
    x = 214,075,393.21/18,714.53
  6. Step 6: Final answer
    x = 11,439.00

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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.