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Finding the Fourth Proportional to 18,472.70, 25,491.30 and 10,515

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Solution

The fourth proportional to 18,472.70, 25,491.30 and 10,515 is: 14,510.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,472.70 : 25,491.30 = 10,515 : x
  2. Step 2: Convert to fraction form
    18,472.70/25,491.30 = 10,515/x
  3. Step 3: Cross multiply
    18,472.70x = 25,491.30 × 10,515
  4. Step 4: Simplify right side
    18,472.70x = 268,041,019.50
  5. Step 5: Solve for x
    x = 268,041,019.50/18,472.70
  6. Step 6: Final answer
    x = 14,510.12

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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.