Home / 28,140.21-42,212.51-9,420.30

Finding the Fourth Proportional to 28,140.21, 42,212.51 and 9,420.30

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Solution

The fourth proportional to 28,140.21, 42,212.51 and 9,420.30 is: 14,131.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,140.21 : 42,212.51 = 9,420.30 : x
  2. Step 2: Convert to fraction form
    28,140.21/42,212.51 = 9,420.30/x
  3. Step 3: Cross multiply
    28,140.21x = 42,212.51 × 9,420.30
  4. Step 4: Simplify right side
    28,140.21x = 397,654,507.95
  5. Step 5: Solve for x
    x = 397,654,507.95/28,140.21
  6. Step 6: Final answer
    x = 14,131.18

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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.