Home / 12,720.13-17,558.45-9,570.85

Finding the Fourth Proportional to 12,720.13, 17,558.45 and 9,570.85

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Solution

The fourth proportional to 12,720.13, 17,558.45 and 9,570.85 is: 13,211.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,720.13 : 17,558.45 = 9,570.85 : x
  2. Step 2: Convert to fraction form
    12,720.13/17,558.45 = 9,570.85/x
  3. Step 3: Cross multiply
    12,720.13x = 17,558.45 × 9,570.85
  4. Step 4: Simplify right side
    12,720.13x = 168,049,291.18
  5. Step 5: Solve for x
    x = 168,049,291.18/12,720.13
  6. Step 6: Final answer
    x = 13,211.29

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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.