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Finding the Fourth Proportional to 9,903.13, 13,666.16 and 5,921.98

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Solution

The fourth proportional to 9,903.13, 13,666.16 and 5,921.98 is: 8,172.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,903.13 : 13,666.16 = 5,921.98 : x
  2. Step 2: Convert to fraction form
    9,903.13/13,666.16 = 5,921.98/x
  3. Step 3: Cross multiply
    9,903.13x = 13,666.16 × 5,921.98
  4. Step 4: Simplify right side
    9,903.13x = 80,930,696.59
  5. Step 5: Solve for x
    x = 80,930,696.59/9,903.13
  6. Step 6: Final answer
    x = 8,172.23

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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.