Home / 20,920.60-31,424.64-17,640.10

Finding the Fourth Proportional to 20,920.60, 31,424.64 and 17,640.10

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Solution

The fourth proportional to 20,920.60, 31,424.64 and 17,640.10 is: 26,497.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,920.60 : 31,424.64 = 17,640.10 : x
  2. Step 2: Convert to fraction form
    20,920.60/31,424.64 = 17,640.10/x
  3. Step 3: Cross multiply
    20,920.60x = 31,424.64 × 17,640.10
  4. Step 4: Simplify right side
    20,920.60x = 554,333,792.06
  5. Step 5: Solve for x
    x = 554,333,792.06/20,920.60
  6. Step 6: Final answer
    x = 26,497.03

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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.