Home / 13,572.16-20,358.88-4,218.64

Finding the Fourth Proportional to 13,572.16, 20,358.88 and 4,218.64

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Solution

The fourth proportional to 13,572.16, 20,358.88 and 4,218.64 is: 6,328.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,572.16 : 20,358.88 = 4,218.64 : x
  2. Step 2: Convert to fraction form
    13,572.16/20,358.88 = 4,218.64/x
  3. Step 3: Cross multiply
    13,572.16x = 20,358.88 × 4,218.64
  4. Step 4: Simplify right side
    13,572.16x = 85,886,785.52
  5. Step 5: Solve for x
    x = 85,886,785.52/13,572.16
  6. Step 6: Final answer
    x = 6,328.16

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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.