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Finding the Fourth Proportional to 9,890.71, 13,649.19 and 5,414.49

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Solution

The fourth proportional to 9,890.71, 13,649.19 and 5,414.49 is: 7,472.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,890.71 : 13,649.19 = 5,414.49 : x
  2. Step 2: Convert to fraction form
    9,890.71/13,649.19 = 5,414.49/x
  3. Step 3: Cross multiply
    9,890.71x = 13,649.19 × 5,414.49
  4. Step 4: Simplify right side
    9,890.71x = 73,903,382.46
  5. Step 5: Solve for x
    x = 73,903,382.46/9,890.71
  6. Step 6: Final answer
    x = 7,472.00

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.