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Finding the Fourth Proportional to 15,156.66, 20,917.14 and 10,117.68

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Solution

The fourth proportional to 15,156.66, 20,917.14 and 10,117.68 is: 13,963.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,156.66 : 20,917.14 = 10,117.68 : x
  2. Step 2: Convert to fraction form
    15,156.66/20,917.14 = 10,117.68/x
  3. Step 3: Cross multiply
    15,156.66x = 20,917.14 × 10,117.68
  4. Step 4: Simplify right side
    15,156.66x = 211,632,929.04
  5. Step 5: Solve for x
    x = 211,632,929.04/15,156.66
  6. Step 6: Final answer
    x = 13,963.03

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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.