Home / 12,655.11-17,465.10-6,990.39

Finding the Fourth Proportional to 12,655.11, 17,465.10 and 6,990.39

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Solution

The fourth proportional to 12,655.11, 17,465.10 and 6,990.39 is: 9,647.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,655.11 : 17,465.10 = 6,990.39 : x
  2. Step 2: Convert to fraction form
    12,655.11/17,465.10 = 6,990.39/x
  3. Step 3: Cross multiply
    12,655.11x = 17,465.10 × 6,990.39
  4. Step 4: Simplify right side
    12,655.11x = 122,087,860.39
  5. Step 5: Solve for x
    x = 122,087,860.39/12,655.11
  6. Step 6: Final answer
    x = 9,647.32

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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.