Home / 9,905.15-13,669.22-5,428.81

Finding the Fourth Proportional to 9,905.15, 13,669.22 and 5,428.81

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Solution

The fourth proportional to 9,905.15, 13,669.22 and 5,428.81 is: 7,491.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,905.15 : 13,669.22 = 5,428.81 : x
  2. Step 2: Convert to fraction form
    9,905.15/13,669.22 = 5,428.81/x
  3. Step 3: Cross multiply
    9,905.15x = 13,669.22 × 5,428.81
  4. Step 4: Simplify right side
    9,905.15x = 74,207,577.63
  5. Step 5: Solve for x
    x = 74,207,577.63/9,905.15
  6. Step 6: Final answer
    x = 7,491.82

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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.