Home / 8,619.12-12,928.73-4,721.40

Finding the Fourth Proportional to 8,619.12, 12,928.73 and 4,721.40

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Solution

The fourth proportional to 8,619.12, 12,928.73 and 4,721.40 is: 7,082.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,619.12 : 12,928.73 = 4,721.40 : x
  2. Step 2: Convert to fraction form
    8,619.12/12,928.73 = 4,721.40/x
  3. Step 3: Cross multiply
    8,619.12x = 12,928.73 × 4,721.40
  4. Step 4: Simplify right side
    8,619.12x = 61,041,682.22
  5. Step 5: Solve for x
    x = 61,041,682.22/8,619.12
  6. Step 6: Final answer
    x = 7,082.12

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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.