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Finding the Fourth Proportional to 15,076.78, 20,792.35 and 9,412.06

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Solution

The fourth proportional to 15,076.78, 20,792.35 and 9,412.06 is: 12,980.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,076.78 : 20,792.35 = 9,412.06 : x
  2. Step 2: Convert to fraction form
    15,076.78/20,792.35 = 9,412.06/x
  3. Step 3: Cross multiply
    15,076.78x = 20,792.35 × 9,412.06
  4. Step 4: Simplify right side
    15,076.78x = 195,698,694.72
  5. Step 5: Solve for x
    x = 195,698,694.72/15,076.78
  6. Step 6: Final answer
    x = 12,980.14

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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.