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Finding the Fourth Proportional to 10,663.91, 15,989.01 and 4,428.22

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Solution

The fourth proportional to 10,663.91, 15,989.01 and 4,428.22 is: 6,639.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,663.91 : 15,989.01 = 4,428.22 : x
  2. Step 2: Convert to fraction form
    10,663.91/15,989.01 = 4,428.22/x
  3. Step 3: Cross multiply
    10,663.91x = 15,989.01 × 4,428.22
  4. Step 4: Simplify right side
    10,663.91x = 70,802,853.86
  5. Step 5: Solve for x
    x = 70,802,853.86/10,663.91
  6. Step 6: Final answer
    x = 6,639.48

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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.