Home / 28,606.90-42,870.85-20,645.95

Finding the Fourth Proportional to 28,606.90, 42,870.85 and 20,645.95

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Solution

The fourth proportional to 28,606.90, 42,870.85 and 20,645.95 is: 30,940.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,606.90 : 42,870.85 = 20,645.95 : x
  2. Step 2: Convert to fraction form
    28,606.90/42,870.85 = 20,645.95/x
  3. Step 3: Cross multiply
    28,606.90x = 42,870.85 × 20,645.95
  4. Step 4: Simplify right side
    28,606.90x = 885,109,425.56
  5. Step 5: Solve for x
    x = 885,109,425.56/28,606.90
  6. Step 6: Final answer
    x = 30,940.42

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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.