Home / 13,099.20-18,076.31-7,130.72

Finding the Fourth Proportional to 13,099.20, 18,076.31 and 7,130.72

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Solution

The fourth proportional to 13,099.20, 18,076.31 and 7,130.72 is: 9,840.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,099.20 : 18,076.31 = 7,130.72 : x
  2. Step 2: Convert to fraction form
    13,099.20/18,076.31 = 7,130.72/x
  3. Step 3: Cross multiply
    13,099.20x = 18,076.31 × 7,130.72
  4. Step 4: Simplify right side
    13,099.20x = 128,896,979.21
  5. Step 5: Solve for x
    x = 128,896,979.21/13,099.20
  6. Step 6: Final answer
    x = 9,840.06

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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.