Home / 12,720.83-19,056.54-7,157.21

Finding the Fourth Proportional to 12,720.83, 19,056.54 and 7,157.21

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Solution

The fourth proportional to 12,720.83, 19,056.54 and 7,157.21 is: 10,721.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,720.83 : 19,056.54 = 7,157.21 : x
  2. Step 2: Convert to fraction form
    12,720.83/19,056.54 = 7,157.21/x
  3. Step 3: Cross multiply
    12,720.83x = 19,056.54 × 7,157.21
  4. Step 4: Simplify right side
    12,720.83x = 136,391,658.65
  5. Step 5: Solve for x
    x = 136,391,658.65/12,720.83
  6. Step 6: Final answer
    x = 10,721.92

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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.