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Finding the Fourth Proportional to 21,663.52, 32,495.28 and 7,620.24

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Solution

The fourth proportional to 21,663.52, 32,495.28 and 7,620.24 is: 11,430.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,663.52 : 32,495.28 = 7,620.24 : x
  2. Step 2: Convert to fraction form
    21,663.52/32,495.28 = 7,620.24/x
  3. Step 3: Cross multiply
    21,663.52x = 32,495.28 × 7,620.24
  4. Step 4: Simplify right side
    21,663.52x = 247,621,832.47
  5. Step 5: Solve for x
    x = 247,621,832.47/21,663.52
  6. Step 6: Final answer
    x = 11,430.36

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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.