Home / 30,297.80-45,428.88-12,758.12

Finding the Fourth Proportional to 30,297.80, 45,428.88 and 12,758.12

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Solution

The fourth proportional to 30,297.80, 45,428.88 and 12,758.12 is: 19,129.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,297.80 : 45,428.88 = 12,758.12 : x
  2. Step 2: Convert to fraction form
    30,297.80/45,428.88 = 12,758.12/x
  3. Step 3: Cross multiply
    30,297.80x = 45,428.88 × 12,758.12
  4. Step 4: Simplify right side
    30,297.80x = 579,587,102.51
  5. Step 5: Solve for x
    x = 579,587,102.51/30,297.80
  6. Step 6: Final answer
    x = 19,129.68

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.