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Finding the Fourth Proportional to 21,663.66, 32,495.49 and 7,812.66

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Solution

The fourth proportional to 21,663.66, 32,495.49 and 7,812.66 is: 11,718.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,663.66 : 32,495.49 = 7,812.66 : x
  2. Step 2: Convert to fraction form
    21,663.66/32,495.49 = 7,812.66/x
  3. Step 3: Cross multiply
    21,663.66x = 32,495.49 × 7,812.66
  4. Step 4: Simplify right side
    21,663.66x = 253,876,214.90
  5. Step 5: Solve for x
    x = 253,876,214.90/21,663.66
  6. Step 6: Final answer
    x = 11,718.99

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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.