Home / 12,385.40-17,090.04-7,079.20

Finding the Fourth Proportional to 12,385.40, 17,090.04 and 7,079.20

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Solution

The fourth proportional to 12,385.40, 17,090.04 and 7,079.20 is: 9,768.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,385.40 : 17,090.04 = 7,079.20 : x
  2. Step 2: Convert to fraction form
    12,385.40/17,090.04 = 7,079.20/x
  3. Step 3: Cross multiply
    12,385.40x = 17,090.04 × 7,079.20
  4. Step 4: Simplify right side
    12,385.40x = 120,983,811.17
  5. Step 5: Solve for x
    x = 120,983,811.17/12,385.40
  6. Step 6: Final answer
    x = 9,768.26

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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.