Home / 30,219.36-45,314.30-9,155.50

Finding the Fourth Proportional to 30,219.36, 45,314.30 and 9,155.50

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Solution

The fourth proportional to 30,219.36, 45,314.30 and 9,155.50 is: 13,728.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,219.36 : 45,314.30 = 9,155.50 : x
  2. Step 2: Convert to fraction form
    30,219.36/45,314.30 = 9,155.50/x
  3. Step 3: Cross multiply
    30,219.36x = 45,314.30 × 9,155.50
  4. Step 4: Simplify right side
    30,219.36x = 414,875,073.65
  5. Step 5: Solve for x
    x = 414,875,073.65/30,219.36
  6. Step 6: Final answer
    x = 13,728.78

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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.