Home / 12,985.11-17,919.41-7,320.47

Finding the Fourth Proportional to 12,985.11, 17,919.41 and 7,320.47

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Solution

The fourth proportional to 12,985.11, 17,919.41 and 7,320.47 is: 10,102.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,985.11 : 17,919.41 = 7,320.47 : x
  2. Step 2: Convert to fraction form
    12,985.11/17,919.41 = 7,320.47/x
  3. Step 3: Cross multiply
    12,985.11x = 17,919.41 × 7,320.47
  4. Step 4: Simplify right side
    12,985.11x = 131,178,377.12
  5. Step 5: Solve for x
    x = 131,178,377.12/12,985.11
  6. Step 6: Final answer
    x = 10,102.22

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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.