Home / 8,485.60-12,720.96-4,320.16

Finding the Fourth Proportional to 8,485.60, 12,720.96 and 4,320.16

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Solution

The fourth proportional to 8,485.60, 12,720.96 and 4,320.16 is: 6,476.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,485.60 : 12,720.96 = 4,320.16 : x
  2. Step 2: Convert to fraction form
    8,485.60/12,720.96 = 4,320.16/x
  3. Step 3: Cross multiply
    8,485.60x = 12,720.96 × 4,320.16
  4. Step 4: Simplify right side
    8,485.60x = 54,956,582.55
  5. Step 5: Solve for x
    x = 54,956,582.55/8,485.60
  6. Step 6: Final answer
    x = 6,476.45

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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.