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Finding the Fourth Proportional to 9,787.80, 14,762.73 and 9,139.80

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Solution

The fourth proportional to 9,787.80, 14,762.73 and 9,139.80 is: 13,785.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,787.80 : 14,762.73 = 9,139.80 : x
  2. Step 2: Convert to fraction form
    9,787.80/14,762.73 = 9,139.80/x
  3. Step 3: Cross multiply
    9,787.80x = 14,762.73 × 9,139.80
  4. Step 4: Simplify right side
    9,787.80x = 134,928,399.65
  5. Step 5: Solve for x
    x = 134,928,399.65/9,787.80
  6. Step 6: Final answer
    x = 13,785.37

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.