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Finding the Fourth Proportional to 11,573.76, 17,388.64 and 7,421.76

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Solution

The fourth proportional to 11,573.76, 17,388.64 and 7,421.76 is: 11,150.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,573.76 : 17,388.64 = 7,421.76 : x
  2. Step 2: Convert to fraction form
    11,573.76/17,388.64 = 7,421.76/x
  3. Step 3: Cross multiply
    11,573.76x = 17,388.64 × 7,421.76
  4. Step 4: Simplify right side
    11,573.76x = 129,054,312.81
  5. Step 5: Solve for x
    x = 129,054,312.81/11,573.76
  6. Step 6: Final answer
    x = 11,150.60

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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.