Home / 18,865.06-28,298.40-6,386.20

Finding the Fourth Proportional to 18,865.06, 28,298.40 and 6,386.20

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Solution

The fourth proportional to 18,865.06, 28,298.40 and 6,386.20 is: 9,579.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,865.06 : 28,298.40 = 6,386.20 : x
  2. Step 2: Convert to fraction form
    18,865.06/28,298.40 = 6,386.20/x
  3. Step 3: Cross multiply
    18,865.06x = 28,298.40 × 6,386.20
  4. Step 4: Simplify right side
    18,865.06x = 180,719,242.08
  5. Step 5: Solve for x
    x = 180,719,242.08/18,865.06
  6. Step 6: Final answer
    x = 9,579.57

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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.