Home / 10,386.60-15,579.90-2,991.30

Finding the Fourth Proportional to 10,386.60, 15,579.90 and 2,991.30

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Solution

The fourth proportional to 10,386.60, 15,579.90 and 2,991.30 is: 4,486.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,386.60 : 15,579.90 = 2,991.30 : x
  2. Step 2: Convert to fraction form
    10,386.60/15,579.90 = 2,991.30/x
  3. Step 3: Cross multiply
    10,386.60x = 15,579.90 × 2,991.30
  4. Step 4: Simplify right side
    10,386.60x = 46,604,154.87
  5. Step 5: Solve for x
    x = 46,604,154.87/10,386.60
  6. Step 6: Final answer
    x = 4,486.95

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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.