Home / 20,864.07-28,792.41-12,480.57

Finding the Fourth Proportional to 20,864.07, 28,792.41 and 12,480.57

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Solution

The fourth proportional to 20,864.07, 28,792.41 and 12,480.57 is: 17,223.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,864.07 : 28,792.41 = 12,480.57 : x
  2. Step 2: Convert to fraction form
    20,864.07/28,792.41 = 12,480.57/x
  3. Step 3: Cross multiply
    20,864.07x = 28,792.41 × 12,480.57
  4. Step 4: Simplify right side
    20,864.07x = 359,345,688.47
  5. Step 5: Solve for x
    x = 359,345,688.47/20,864.07
  6. Step 6: Final answer
    x = 17,223.18

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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.