Home / 9,138.79-12,611.55-4,947.04

Finding the Fourth Proportional to 9,138.79, 12,611.55 and 4,947.04

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Solution

The fourth proportional to 9,138.79, 12,611.55 and 4,947.04 is: 6,826.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,138.79 : 12,611.55 = 4,947.04 : x
  2. Step 2: Convert to fraction form
    9,138.79/12,611.55 = 4,947.04/x
  3. Step 3: Cross multiply
    9,138.79x = 12,611.55 × 4,947.04
  4. Step 4: Simplify right side
    9,138.79x = 62,389,842.31
  5. Step 5: Solve for x
    x = 62,389,842.31/9,138.79
  6. Step 6: Final answer
    x = 6,826.93

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.