Home / 28,428.84-42,654.33-11,784.69

Finding the Fourth Proportional to 28,428.84, 42,654.33 and 11,784.69

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Solution

The fourth proportional to 28,428.84, 42,654.33 and 11,784.69 is: 17,681.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,428.84 : 42,654.33 = 11,784.69 : x
  2. Step 2: Convert to fraction form
    28,428.84/42,654.33 = 11,784.69/x
  3. Step 3: Cross multiply
    28,428.84x = 42,654.33 × 11,784.69
  4. Step 4: Simplify right side
    28,428.84x = 502,668,056.21
  5. Step 5: Solve for x
    x = 502,668,056.21/28,428.84
  6. Step 6: Final answer
    x = 17,681.62

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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.