Home / 28,651.12-42,969.08-20,306.50

Finding the Fourth Proportional to 28,651.12, 42,969.08 and 20,306.50

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Solution

The fourth proportional to 28,651.12, 42,969.08 and 20,306.50 is: 30,454.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,651.12 : 42,969.08 = 20,306.50 : x
  2. Step 2: Convert to fraction form
    28,651.12/42,969.08 = 20,306.50/x
  3. Step 3: Cross multiply
    28,651.12x = 42,969.08 × 20,306.50
  4. Step 4: Simplify right side
    28,651.12x = 872,551,566.36
  5. Step 5: Solve for x
    x = 872,551,566.36/28,651.12
  6. Step 6: Final answer
    x = 30,454.36

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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.