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Finding the Fourth Proportional to 38,281, 57,421.50 and 10,579

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Solution

The fourth proportional to 38,281, 57,421.50 and 10,579 is: 15,868.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,281 : 57,421.50 = 10,579 : x
  2. Step 2: Convert to fraction form
    38,281/57,421.50 = 10,579/x
  3. Step 3: Cross multiply
    38,281x = 57,421.50 × 10,579
  4. Step 4: Simplify right side
    38,281x = 607,462,048.50
  5. Step 5: Solve for x
    x = 607,462,048.50/38,281
  6. Step 6: Final answer
    x = 15,868.50

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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.