Home / 13,117.37-18,101.43-7,148.90

Finding the Fourth Proportional to 13,117.37, 18,101.43 and 7,148.90

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Solution

The fourth proportional to 13,117.37, 18,101.43 and 7,148.90 is: 9,865.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,117.37 : 18,101.43 = 7,148.90 : x
  2. Step 2: Convert to fraction form
    13,117.37/18,101.43 = 7,148.90/x
  3. Step 3: Cross multiply
    13,117.37x = 18,101.43 × 7,148.90
  4. Step 4: Simplify right side
    13,117.37x = 129,405,358.18
  5. Step 5: Solve for x
    x = 129,405,358.18/13,117.37
  6. Step 6: Final answer
    x = 9,865.19

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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.