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Finding the Fourth Proportional to 15,872.40, 21,903.60 and 8,798.40

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Solution

The fourth proportional to 15,872.40, 21,903.60 and 8,798.40 is: 12,141.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,872.40 : 21,903.60 = 8,798.40 : x
  2. Step 2: Convert to fraction form
    15,872.40/21,903.60 = 8,798.40/x
  3. Step 3: Cross multiply
    15,872.40x = 21,903.60 × 8,798.40
  4. Step 4: Simplify right side
    15,872.40x = 192,716,634.24
  5. Step 5: Solve for x
    x = 192,716,634.24/15,872.40
  6. Step 6: Final answer
    x = 12,141.62

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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.