Home / 28,130.10-42,203.62-8,409.30

Finding the Fourth Proportional to 28,130.10, 42,203.62 and 8,409.30

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Solution

The fourth proportional to 28,130.10, 42,203.62 and 8,409.30 is: 12,616.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,130.10 : 42,203.62 = 8,409.30 : x
  2. Step 2: Convert to fraction form
    28,130.10/42,203.62 = 8,409.30/x
  3. Step 3: Cross multiply
    28,130.10x = 42,203.62 × 8,409.30
  4. Step 4: Simplify right side
    28,130.10x = 354,902,901.67
  5. Step 5: Solve for x
    x = 354,902,901.67/28,130.10
  6. Step 6: Final answer
    x = 12,616.48

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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.