Home / 30,619.80-45,929.70-13,091.40

Finding the Fourth Proportional to 30,619.80, 45,929.70 and 13,091.40

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Solution

The fourth proportional to 30,619.80, 45,929.70 and 13,091.40 is: 19,637.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,619.80 : 45,929.70 = 13,091.40 : x
  2. Step 2: Convert to fraction form
    30,619.80/45,929.70 = 13,091.40/x
  3. Step 3: Cross multiply
    30,619.80x = 45,929.70 × 13,091.40
  4. Step 4: Simplify right side
    30,619.80x = 601,284,074.58
  5. Step 5: Solve for x
    x = 601,284,074.58/30,619.80
  6. Step 6: Final answer
    x = 19,637.10

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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.