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Finding the Fourth Proportional to 28,510.70, 42,735.80 and 10,972.94

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Solution

The fourth proportional to 28,510.70, 42,735.80 and 10,972.94 is: 16,447.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,510.70 : 42,735.80 = 10,972.94 : x
  2. Step 2: Convert to fraction form
    28,510.70/42,735.80 = 10,972.94/x
  3. Step 3: Cross multiply
    28,510.70x = 42,735.80 × 10,972.94
  4. Step 4: Simplify right side
    28,510.70x = 468,937,369.25
  5. Step 5: Solve for x
    x = 468,937,369.25/28,510.70
  6. Step 6: Final answer
    x = 16,447.77

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.