Home / 10,428.12-14,390.70-5,712.38

Finding the Fourth Proportional to 10,428.12, 14,390.70 and 5,712.38

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Solution

The fourth proportional to 10,428.12, 14,390.70 and 5,712.38 is: 7,883.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,428.12 : 14,390.70 = 5,712.38 : x
  2. Step 2: Convert to fraction form
    10,428.12/14,390.70 = 5,712.38/x
  3. Step 3: Cross multiply
    10,428.12x = 14,390.70 × 5,712.38
  4. Step 4: Simplify right side
    10,428.12x = 82,205,146.87
  5. Step 5: Solve for x
    x = 82,205,146.87/10,428.12
  6. Step 6: Final answer
    x = 7,883.03

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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.