Home / 13,129.07-18,117.71-7,160.86

Finding the Fourth Proportional to 13,129.07, 18,117.71 and 7,160.86

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Solution

The fourth proportional to 13,129.07, 18,117.71 and 7,160.86 is: 9,881.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,129.07 : 18,117.71 = 7,160.86 : x
  2. Step 2: Convert to fraction form
    13,129.07/18,117.71 = 7,160.86/x
  3. Step 3: Cross multiply
    13,129.07x = 18,117.71 × 7,160.86
  4. Step 4: Simplify right side
    13,129.07x = 129,738,294.24
  5. Step 5: Solve for x
    x = 129,738,294.24/13,129.07
  6. Step 6: Final answer
    x = 9,881.76

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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.