Home / 12,415.20-17,129.10-7,109.04

Finding the Fourth Proportional to 12,415.20, 17,129.10 and 7,109.04

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Solution

The fourth proportional to 12,415.20, 17,129.10 and 7,109.04 is: 9,808.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,415.20 : 17,129.10 = 7,109.04 : x
  2. Step 2: Convert to fraction form
    12,415.20/17,129.10 = 7,109.04/x
  3. Step 3: Cross multiply
    12,415.20x = 17,129.10 × 7,109.04
  4. Step 4: Simplify right side
    12,415.20x = 121,771,457.06
  5. Step 5: Solve for x
    x = 121,771,457.06/12,415.20
  6. Step 6: Final answer
    x = 9,808.26

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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.