Home / 13,158.66-18,158.40-7,190.31

Finding the Fourth Proportional to 13,158.66, 18,158.40 and 7,190.31

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Solution

The fourth proportional to 13,158.66, 18,158.40 and 7,190.31 is: 9,922.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,158.66 : 18,158.40 = 7,190.31 : x
  2. Step 2: Convert to fraction form
    13,158.66/18,158.40 = 7,190.31/x
  3. Step 3: Cross multiply
    13,158.66x = 18,158.40 × 7,190.31
  4. Step 4: Simplify right side
    13,158.66x = 130,564,525.10
  5. Step 5: Solve for x
    x = 130,564,525.10/13,158.66
  6. Step 6: Final answer
    x = 9,922.33

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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.