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Finding the Fourth Proportional to 28,564.74, 39,420 and 16,630.20

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Solution

The fourth proportional to 28,564.74, 39,420 and 16,630.20 is: 22,950.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,564.74 : 39,420 = 16,630.20 : x
  2. Step 2: Convert to fraction form
    28,564.74/39,420 = 16,630.20/x
  3. Step 3: Cross multiply
    28,564.74x = 39,420 × 16,630.20
  4. Step 4: Simplify right side
    28,564.74x = 655,562,484
  5. Step 5: Solve for x
    x = 655,562,484/28,564.74
  6. Step 6: Final answer
    x = 22,950.06

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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.