Home / 28,507.38-42,762.48-20,196.78

Finding the Fourth Proportional to 28,507.38, 42,762.48 and 20,196.78

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Solution

The fourth proportional to 28,507.38, 42,762.48 and 20,196.78 is: 30,296.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,507.38 : 42,762.48 = 20,196.78 : x
  2. Step 2: Convert to fraction form
    28,507.38/42,762.48 = 20,196.78/x
  3. Step 3: Cross multiply
    28,507.38x = 42,762.48 × 20,196.78
  4. Step 4: Simplify right side
    28,507.38x = 863,664,400.81
  5. Step 5: Solve for x
    x = 863,664,400.81/28,507.38
  6. Step 6: Final answer
    x = 30,296.17

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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.