Home / 12,813.40-17,682.15-7,148.32

Finding the Fourth Proportional to 12,813.40, 17,682.15 and 7,148.32

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Solution

The fourth proportional to 12,813.40, 17,682.15 and 7,148.32 is: 9,864.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,813.40 : 17,682.15 = 7,148.32 : x
  2. Step 2: Convert to fraction form
    12,813.40/17,682.15 = 7,148.32/x
  3. Step 3: Cross multiply
    12,813.40x = 17,682.15 × 7,148.32
  4. Step 4: Simplify right side
    12,813.40x = 126,397,666.49
  5. Step 5: Solve for x
    x = 126,397,666.49/12,813.40
  6. Step 6: Final answer
    x = 9,864.49

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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.