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Finding the Fourth Proportional to 17,792.10, 26,666.55 and 7,920.90

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Solution

The fourth proportional to 17,792.10, 26,666.55 and 7,920.90 is: 11,871.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,792.10 : 26,666.55 = 7,920.90 : x
  2. Step 2: Convert to fraction form
    17,792.10/26,666.55 = 7,920.90/x
  3. Step 3: Cross multiply
    17,792.10x = 26,666.55 × 7,920.90
  4. Step 4: Simplify right side
    17,792.10x = 211,223,075.90
  5. Step 5: Solve for x
    x = 211,223,075.90/17,792.10
  6. Step 6: Final answer
    x = 11,871.73

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1.5x scale

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.