Home / 12,345.16-18,517.26-4,947.40

Finding the Fourth Proportional to 12,345.16, 18,517.26 and 4,947.40

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Solution

The fourth proportional to 12,345.16, 18,517.26 and 4,947.40 is: 7,420.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,345.16 : 18,517.26 = 4,947.40 : x
  2. Step 2: Convert to fraction form
    12,345.16/18,517.26 = 4,947.40/x
  3. Step 3: Cross multiply
    12,345.16x = 18,517.26 × 4,947.40
  4. Step 4: Simplify right side
    12,345.16x = 91,612,292.12
  5. Step 5: Solve for x
    x = 91,612,292.12/12,345.16
  6. Step 6: Final answer
    x = 7,420.91

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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.