Home / 30,220.80-45,331.20-19,091.40

Finding the Fourth Proportional to 30,220.80, 45,331.20 and 19,091.40

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Solution

The fourth proportional to 30,220.80, 45,331.20 and 19,091.40 is: 28,637.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,220.80 : 45,331.20 = 19,091.40 : x
  2. Step 2: Convert to fraction form
    30,220.80/45,331.20 = 19,091.40/x
  3. Step 3: Cross multiply
    30,220.80x = 45,331.20 × 19,091.40
  4. Step 4: Simplify right side
    30,220.80x = 865,436,071.68
  5. Step 5: Solve for x
    x = 865,436,071.68/30,220.80
  6. Step 6: Final answer
    x = 28,637.10

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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.