Home / 13,100.47-18,078.08-7,132.16

Finding the Fourth Proportional to 13,100.47, 18,078.08 and 7,132.16

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Solution

The fourth proportional to 13,100.47, 18,078.08 and 7,132.16 is: 9,842.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,100.47 : 18,078.08 = 7,132.16 : x
  2. Step 2: Convert to fraction form
    13,100.47/18,078.08 = 7,132.16/x
  3. Step 3: Cross multiply
    13,100.47x = 18,078.08 × 7,132.16
  4. Step 4: Simplify right side
    13,100.47x = 128,935,727.54
  5. Step 5: Solve for x
    x = 128,935,727.54/13,100.47
  6. Step 6: Final answer
    x = 9,842.07

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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.