Home / 10,618.84-15,931.50-5,428.36

Finding the Fourth Proportional to 10,618.84, 15,931.50 and 5,428.36

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Solution

The fourth proportional to 10,618.84, 15,931.50 and 5,428.36 is: 8,144.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,618.84 : 15,931.50 = 5,428.36 : x
  2. Step 2: Convert to fraction form
    10,618.84/15,931.50 = 5,428.36/x
  3. Step 3: Cross multiply
    10,618.84x = 15,931.50 × 5,428.36
  4. Step 4: Simplify right side
    10,618.84x = 86,481,917.34
  5. Step 5: Solve for x
    x = 86,481,917.34/10,618.84
  6. Step 6: Final answer
    x = 8,144.20

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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.