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Finding the Fourth Proportional to 28,792.90, 39,733.14 and 16,215.22

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Solution

The fourth proportional to 28,792.90, 39,733.14 and 16,215.22 is: 22,376.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,792.90 : 39,733.14 = 16,215.22 : x
  2. Step 2: Convert to fraction form
    28,792.90/39,733.14 = 16,215.22/x
  3. Step 3: Cross multiply
    28,792.90x = 39,733.14 × 16,215.22
  4. Step 4: Simplify right side
    28,792.90x = 644,281,606.39
  5. Step 5: Solve for x
    x = 644,281,606.39/28,792.90
  6. Step 6: Final answer
    x = 22,376.41

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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.