Home / 13,130.29-18,120.01-7,161.95

Finding the Fourth Proportional to 13,130.29, 18,120.01 and 7,161.95

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Solution

The fourth proportional to 13,130.29, 18,120.01 and 7,161.95 is: 9,883.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,130.29 : 18,120.01 = 7,161.95 : x
  2. Step 2: Convert to fraction form
    13,130.29/18,120.01 = 7,161.95/x
  3. Step 3: Cross multiply
    13,130.29x = 18,120.01 × 7,161.95
  4. Step 4: Simplify right side
    13,130.29x = 129,774,633.01
  5. Step 5: Solve for x
    x = 129,774,633.01/13,130.29
  6. Step 6: Final answer
    x = 9,883.61

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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.