Home / 12,772.80-19,166.40-7,155.36

Finding the Fourth Proportional to 12,772.80, 19,166.40 and 7,155.36

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Solution

The fourth proportional to 12,772.80, 19,166.40 and 7,155.36 is: 10,737.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,772.80 : 19,166.40 = 7,155.36 : x
  2. Step 2: Convert to fraction form
    12,772.80/19,166.40 = 7,155.36/x
  3. Step 3: Cross multiply
    12,772.80x = 19,166.40 × 7,155.36
  4. Step 4: Simplify right side
    12,772.80x = 137,142,491.90
  5. Step 5: Solve for x
    x = 137,142,491.90/12,772.80
  6. Step 6: Final answer
    x = 10,737.07

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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.