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Finding the Fourth Proportional to 19,996.58, 30,009.72 and 7,528.88

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Solution

The fourth proportional to 19,996.58, 30,009.72 and 7,528.88 is: 11,298.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,996.58 : 30,009.72 = 7,528.88 : x
  2. Step 2: Convert to fraction form
    19,996.58/30,009.72 = 7,528.88/x
  3. Step 3: Cross multiply
    19,996.58x = 30,009.72 × 7,528.88
  4. Step 4: Simplify right side
    19,996.58x = 225,939,580.71
  5. Step 5: Solve for x
    x = 225,939,580.71/19,996.58
  6. Step 6: Final answer
    x = 11,298.91

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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.