Home / 8,721.12-12,035.20-4,742.30

Finding the Fourth Proportional to 8,721.12, 12,035.20 and 4,742.30

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Solution

The fourth proportional to 8,721.12, 12,035.20 and 4,742.30 is: 6,544.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,721.12 : 12,035.20 = 4,742.30 : x
  2. Step 2: Convert to fraction form
    8,721.12/12,035.20 = 4,742.30/x
  3. Step 3: Cross multiply
    8,721.12x = 12,035.20 × 4,742.30
  4. Step 4: Simplify right side
    8,721.12x = 57,074,528.96
  5. Step 5: Solve for x
    x = 57,074,528.96/8,721.12
  6. Step 6: Final answer
    x = 6,544.40

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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.