Home / 13,130.70-18,119.93-7,162.48

Finding the Fourth Proportional to 13,130.70, 18,119.93 and 7,162.48

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Solution

The fourth proportional to 13,130.70, 18,119.93 and 7,162.48 is: 9,883.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,130.70 : 18,119.93 = 7,162.48 : x
  2. Step 2: Convert to fraction form
    13,130.70/18,119.93 = 7,162.48/x
  3. Step 3: Cross multiply
    13,130.70x = 18,119.93 × 7,162.48
  4. Step 4: Simplify right side
    13,130.70x = 129,783,636.23
  5. Step 5: Solve for x
    x = 129,783,636.23/13,130.70
  6. Step 6: Final answer
    x = 9,883.98

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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.