Home / 30,215.10-45,338.85-12,686.70

Finding the Fourth Proportional to 30,215.10, 45,338.85 and 12,686.70

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Solution

The fourth proportional to 30,215.10, 45,338.85 and 12,686.70 is: 19,036.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,215.10 : 45,338.85 = 12,686.70 : x
  2. Step 2: Convert to fraction form
    30,215.10/45,338.85 = 12,686.70/x
  3. Step 3: Cross multiply
    30,215.10x = 45,338.85 × 12,686.70
  4. Step 4: Simplify right side
    30,215.10x = 575,200,388.30
  5. Step 5: Solve for x
    x = 575,200,388.30/30,215.10
  6. Step 6: Final answer
    x = 19,036.85

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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.