Home / 15,390.60-23,086.62-7,990.38

Finding the Fourth Proportional to 15,390.60, 23,086.62 and 7,990.38

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Solution

The fourth proportional to 15,390.60, 23,086.62 and 7,990.38 is: 11,985.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,390.60 : 23,086.62 = 7,990.38 : x
  2. Step 2: Convert to fraction form
    15,390.60/23,086.62 = 7,990.38/x
  3. Step 3: Cross multiply
    15,390.60x = 23,086.62 × 7,990.38
  4. Step 4: Simplify right side
    15,390.60x = 184,470,866.72
  5. Step 5: Solve for x
    x = 184,470,866.72/15,390.60
  6. Step 6: Final answer
    x = 11,985.94

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1.5x scale

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.