Home / 9,120.15-12,585.78-4,928.40

Finding the Fourth Proportional to 9,120.15, 12,585.78 and 4,928.40

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Solution

The fourth proportional to 9,120.15, 12,585.78 and 4,928.40 is: 6,801.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,120.15 : 12,585.78 = 4,928.40 : x
  2. Step 2: Convert to fraction form
    9,120.15/12,585.78 = 4,928.40/x
  3. Step 3: Cross multiply
    9,120.15x = 12,585.78 × 4,928.40
  4. Step 4: Simplify right side
    9,120.15x = 62,027,758.15
  5. Step 5: Solve for x
    x = 62,027,758.15/9,120.15
  6. Step 6: Final answer
    x = 6,801.18

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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.