Home / 12,720.39-17,555.19-7,056.93

Finding the Fourth Proportional to 12,720.39, 17,555.19 and 7,056.93

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Solution

The fourth proportional to 12,720.39, 17,555.19 and 7,056.93 is: 9,739.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,720.39 : 17,555.19 = 7,056.93 : x
  2. Step 2: Convert to fraction form
    12,720.39/17,555.19 = 7,056.93/x
  3. Step 3: Cross multiply
    12,720.39x = 17,555.19 × 7,056.93
  4. Step 4: Simplify right side
    12,720.39x = 123,885,746.97
  5. Step 5: Solve for x
    x = 123,885,746.97/12,720.39
  6. Step 6: Final answer
    x = 9,739.15

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.