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Finding the Fourth Proportional to 17,908.40, 24,689.40 and 15,109.04

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Solution

The fourth proportional to 17,908.40, 24,689.40 and 15,109.04 is: 20,830.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,908.40 : 24,689.40 = 15,109.04 : x
  2. Step 2: Convert to fraction form
    17,908.40/24,689.40 = 15,109.04/x
  3. Step 3: Cross multiply
    17,908.40x = 24,689.40 × 15,109.04
  4. Step 4: Simplify right side
    17,908.40x = 373,033,132.18
  5. Step 5: Solve for x
    x = 373,033,132.18/17,908.40
  6. Step 6: Final answer
    x = 20,830.06

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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.