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Finding the Fourth Proportional to 15,790.98, 21,792.90 and 9,077.94

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Solution

The fourth proportional to 15,790.98, 21,792.90 and 9,077.94 is: 12,528.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,790.98 : 21,792.90 = 9,077.94 : x
  2. Step 2: Convert to fraction form
    15,790.98/21,792.90 = 9,077.94/x
  3. Step 3: Cross multiply
    15,790.98x = 21,792.90 × 9,077.94
  4. Step 4: Simplify right side
    15,790.98x = 197,834,638.63
  5. Step 5: Solve for x
    x = 197,834,638.63/15,790.98
  6. Step 6: Final answer
    x = 12,528.33

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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.