Home / 11,114.60-15,340.20-7,140.68

Finding the Fourth Proportional to 11,114.60, 15,340.20 and 7,140.68

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Solution

The fourth proportional to 11,114.60, 15,340.20 and 7,140.68 is: 9,855.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,114.60 : 15,340.20 = 7,140.68 : x
  2. Step 2: Convert to fraction form
    11,114.60/15,340.20 = 7,140.68/x
  3. Step 3: Cross multiply
    11,114.60x = 15,340.20 × 7,140.68
  4. Step 4: Simplify right side
    11,114.60x = 109,539,459.34
  5. Step 5: Solve for x
    x = 109,539,459.34/11,114.60
  6. Step 6: Final answer
    x = 9,855.46

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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.