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Finding the Fourth Proportional to 18,921.84, 26,112.72 and 10,423.50

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Solution

The fourth proportional to 18,921.84, 26,112.72 and 10,423.50 is: 14,384.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,921.84 : 26,112.72 = 10,423.50 : x
  2. Step 2: Convert to fraction form
    18,921.84/26,112.72 = 10,423.50/x
  3. Step 3: Cross multiply
    18,921.84x = 26,112.72 × 10,423.50
  4. Step 4: Simplify right side
    18,921.84x = 272,185,936.92
  5. Step 5: Solve for x
    x = 272,185,936.92/18,921.84
  6. Step 6: Final answer
    x = 14,384.75

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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.