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Finding the Fourth Proportional to 21,663.36, 32,499.36 and 7,813.44

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Solution

The fourth proportional to 21,663.36, 32,499.36 and 7,813.44 is: 11,721.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,663.36 : 32,499.36 = 7,813.44 : x
  2. Step 2: Convert to fraction form
    21,663.36/32,499.36 = 7,813.44/x
  3. Step 3: Cross multiply
    21,663.36x = 32,499.36 × 7,813.44
  4. Step 4: Simplify right side
    21,663.36x = 253,931,799.40
  5. Step 5: Solve for x
    x = 253,931,799.40/21,663.36
  6. Step 6: Final answer
    x = 11,721.72

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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.