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Finding the Fourth Proportional to 15,173.70, 20,943.05 and 9,859.29

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Solution

The fourth proportional to 15,173.70, 20,943.05 and 9,859.29 is: 13,607.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,173.70 : 20,943.05 = 9,859.29 : x
  2. Step 2: Convert to fraction form
    15,173.70/20,943.05 = 9,859.29/x
  3. Step 3: Cross multiply
    15,173.70x = 20,943.05 × 9,859.29
  4. Step 4: Simplify right side
    15,173.70x = 206,483,603.43
  5. Step 5: Solve for x
    x = 206,483,603.43/15,173.70
  6. Step 6: Final answer
    x = 13,607.99

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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.