Home / 13,158.47-18,158.39-7,190.16

Finding the Fourth Proportional to 13,158.47, 18,158.39 and 7,190.16

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Solution

The fourth proportional to 13,158.47, 18,158.39 and 7,190.16 is: 9,922.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,158.47 : 18,158.39 = 7,190.16 : x
  2. Step 2: Convert to fraction form
    13,158.47/18,158.39 = 7,190.16/x
  3. Step 3: Cross multiply
    13,158.47x = 18,158.39 × 7,190.16
  4. Step 4: Simplify right side
    13,158.47x = 130,561,693.49
  5. Step 5: Solve for x
    x = 130,561,693.49/13,158.47
  6. Step 6: Final answer
    x = 9,922.26

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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.