Home / 28,130.12-42,203.64-8,409.32

Finding the Fourth Proportional to 28,130.12, 42,203.64 and 8,409.32

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Solution

The fourth proportional to 28,130.12, 42,203.64 and 8,409.32 is: 12,616.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,130.12 : 42,203.64 = 8,409.32 : x
  2. Step 2: Convert to fraction form
    28,130.12/42,203.64 = 8,409.32/x
  3. Step 3: Cross multiply
    28,130.12x = 42,203.64 × 8,409.32
  4. Step 4: Simplify right side
    28,130.12x = 354,903,913.92
  5. Step 5: Solve for x
    x = 354,903,913.92/28,130.12
  6. Step 6: Final answer
    x = 12,616.51

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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.