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Finding the Fourth Proportional to 17,878.59, 24,640.74 and 15,816.40

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Solution

The fourth proportional to 17,878.59, 24,640.74 and 15,816.40 is: 21,798.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,878.59 : 24,640.74 = 15,816.40 : x
  2. Step 2: Convert to fraction form
    17,878.59/24,640.74 = 15,816.40/x
  3. Step 3: Cross multiply
    17,878.59x = 24,640.74 × 15,816.40
  4. Step 4: Simplify right side
    17,878.59x = 389,727,738.53
  5. Step 5: Solve for x
    x = 389,727,738.53/17,878.59
  6. Step 6: Final answer
    x = 21,798.57

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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.