Home / 13,158.59-18,158.09-7,190.31

Finding the Fourth Proportional to 13,158.59, 18,158.09 and 7,190.31

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Solution

The fourth proportional to 13,158.59, 18,158.09 and 7,190.31 is: 9,922.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,158.59 : 18,158.09 = 7,190.31 : x
  2. Step 2: Convert to fraction form
    13,158.59/18,158.09 = 7,190.31/x
  3. Step 3: Cross multiply
    13,158.59x = 18,158.09 × 7,190.31
  4. Step 4: Simplify right side
    13,158.59x = 130,562,314.08
  5. Step 5: Solve for x
    x = 130,562,314.08/13,158.59
  6. Step 6: Final answer
    x = 9,922.21

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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.