Home / 28,078.02-42,126.75-18,755.46

Finding the Fourth Proportional to 28,078.02, 42,126.75 and 18,755.46

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Solution

The fourth proportional to 28,078.02, 42,126.75 and 18,755.46 is: 28,139.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,078.02 : 42,126.75 = 18,755.46 : x
  2. Step 2: Convert to fraction form
    28,078.02/42,126.75 = 18,755.46/x
  3. Step 3: Cross multiply
    28,078.02x = 42,126.75 × 18,755.46
  4. Step 4: Simplify right side
    28,078.02x = 790,106,574.56
  5. Step 5: Solve for x
    x = 790,106,574.56/28,078.02
  6. Step 6: Final answer
    x = 28,139.68

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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.