Home / 20,505.89-28,298.13-11,074.45

Finding the Fourth Proportional to 20,505.89, 28,298.13 and 11,074.45

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Solution

The fourth proportional to 20,505.89, 28,298.13 and 11,074.45 is: 15,282.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,505.89 : 28,298.13 = 11,074.45 : x
  2. Step 2: Convert to fraction form
    20,505.89/28,298.13 = 11,074.45/x
  3. Step 3: Cross multiply
    20,505.89x = 28,298.13 × 11,074.45
  4. Step 4: Simplify right side
    20,505.89x = 313,386,225.78
  5. Step 5: Solve for x
    x = 313,386,225.78/20,505.89
  6. Step 6: Final answer
    x = 15,282.74

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.