Home / 12,720.41-17,551.90-7,681.25

Finding the Fourth Proportional to 12,720.41, 17,551.90 and 7,681.25

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Solution

The fourth proportional to 12,720.41, 17,551.90 and 7,681.25 is: 10,598.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,720.41 : 17,551.90 = 7,681.25 : x
  2. Step 2: Convert to fraction form
    12,720.41/17,551.90 = 7,681.25/x
  3. Step 3: Cross multiply
    12,720.41x = 17,551.90 × 7,681.25
  4. Step 4: Simplify right side
    12,720.41x = 134,820,556.55
  5. Step 5: Solve for x
    x = 134,820,556.55/12,720.41
  6. Step 6: Final answer
    x = 10,598.76

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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.