Home / 20,155.40-30,215.80-7,006.08

Finding the Fourth Proportional to 20,155.40, 30,215.80 and 7,006.08

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Solution

The fourth proportional to 20,155.40, 30,215.80 and 7,006.08 is: 10,503.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,155.40 : 30,215.80 = 7,006.08 : x
  2. Step 2: Convert to fraction form
    20,155.40/30,215.80 = 7,006.08/x
  3. Step 3: Cross multiply
    20,155.40x = 30,215.80 × 7,006.08
  4. Step 4: Simplify right side
    20,155.40x = 211,694,312.06
  5. Step 5: Solve for x
    x = 211,694,312.06/20,155.40
  6. Step 6: Final answer
    x = 10,503.11

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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.