Home / 15,808.78-23,716.80-5,420.50

Finding the Fourth Proportional to 15,808.78, 23,716.80 and 5,420.50

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Solution

The fourth proportional to 15,808.78, 23,716.80 and 5,420.50 is: 8,131.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,808.78 : 23,716.80 = 5,420.50 : x
  2. Step 2: Convert to fraction form
    15,808.78/23,716.80 = 5,420.50/x
  3. Step 3: Cross multiply
    15,808.78x = 23,716.80 × 5,420.50
  4. Step 4: Simplify right side
    15,808.78x = 128,556,914.40
  5. Step 5: Solve for x
    x = 128,556,914.40/15,808.78
  6. Step 6: Final answer
    x = 8,131.99

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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.