Home / 9,120.36-12,585.78-6,472.20

Finding the Fourth Proportional to 9,120.36, 12,585.78 and 6,472.20

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Solution

The fourth proportional to 9,120.36, 12,585.78 and 6,472.20 is: 8,931.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,120.36 : 12,585.78 = 6,472.20 : x
  2. Step 2: Convert to fraction form
    9,120.36/12,585.78 = 6,472.20/x
  3. Step 3: Cross multiply
    9,120.36x = 12,585.78 × 6,472.20
  4. Step 4: Simplify right side
    9,120.36x = 81,457,685.32
  5. Step 5: Solve for x
    x = 81,457,685.32/9,120.36
  6. Step 6: Final answer
    x = 8,931.41

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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.