Home / 28,390.76-42,542.33-17,980.64

Finding the Fourth Proportional to 28,390.76, 42,542.33 and 17,980.64

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Solution

The fourth proportional to 28,390.76, 42,542.33 and 17,980.64 is: 26,943.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,390.76 : 42,542.33 = 17,980.64 : x
  2. Step 2: Convert to fraction form
    28,390.76/42,542.33 = 17,980.64/x
  3. Step 3: Cross multiply
    28,390.76x = 42,542.33 × 17,980.64
  4. Step 4: Simplify right side
    28,390.76x = 764,938,320.49
  5. Step 5: Solve for x
    x = 764,938,320.49/28,390.76
  6. Step 6: Final answer
    x = 26,943.21

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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.