Home / 28,490.12-42,731.94-7,715.24

Finding the Fourth Proportional to 28,490.12, 42,731.94 and 7,715.24

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Solution

The fourth proportional to 28,490.12, 42,731.94 and 7,715.24 is: 11,571.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,490.12 : 42,731.94 = 7,715.24 : x
  2. Step 2: Convert to fraction form
    28,490.12/42,731.94 = 7,715.24/x
  3. Step 3: Cross multiply
    28,490.12x = 42,731.94 × 7,715.24
  4. Step 4: Simplify right side
    28,490.12x = 329,687,172.77
  5. Step 5: Solve for x
    x = 329,687,172.77/28,490.12
  6. Step 6: Final answer
    x = 11,571.98

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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.