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Finding the Fourth Proportional to 28,490.99, 42,731.55 and 7,709.63

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Solution

The fourth proportional to 28,490.99, 42,731.55 and 7,709.63 is: 11,563.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,490.99 : 42,731.55 = 7,709.63 : x
  2. Step 2: Convert to fraction form
    28,490.99/42,731.55 = 7,709.63/x
  3. Step 3: Cross multiply
    28,490.99x = 42,731.55 × 7,709.63
  4. Step 4: Simplify right side
    28,490.99x = 329,444,439.83
  5. Step 5: Solve for x
    x = 329,444,439.83/28,490.99
  6. Step 6: Final answer
    x = 11,563.11

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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.