Home / 28,260.98-42,420.99-20,873.78

Finding the Fourth Proportional to 28,260.98, 42,420.99 and 20,873.78

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Solution

The fourth proportional to 28,260.98, 42,420.99 and 20,873.78 is: 31,332.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,260.98 : 42,420.99 = 20,873.78 : x
  2. Step 2: Convert to fraction form
    28,260.98/42,420.99 = 20,873.78/x
  3. Step 3: Cross multiply
    28,260.98x = 42,420.99 × 20,873.78
  4. Step 4: Simplify right side
    28,260.98x = 885,486,412.64
  5. Step 5: Solve for x
    x = 885,486,412.64/28,260.98
  6. Step 6: Final answer
    x = 31,332.47

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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.