Home / 10,968.20-15,130.77-7,189.71

Finding the Fourth Proportional to 10,968.20, 15,130.77 and 7,189.71

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Solution

The fourth proportional to 10,968.20, 15,130.77 and 7,189.71 is: 9,918.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,968.20 : 15,130.77 = 7,189.71 : x
  2. Step 2: Convert to fraction form
    10,968.20/15,130.77 = 7,189.71/x
  3. Step 3: Cross multiply
    10,968.20x = 15,130.77 × 7,189.71
  4. Step 4: Simplify right side
    10,968.20x = 108,785,746.45
  5. Step 5: Solve for x
    x = 108,785,746.45/10,968.20
  6. Step 6: Final answer
    x = 9,918.28

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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.