Home / 21,325.95-31,950.61-12,556.08

Finding the Fourth Proportional to 21,325.95, 31,950.61 and 12,556.08

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Solution

The fourth proportional to 21,325.95, 31,950.61 and 12,556.08 is: 18,811.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,325.95 : 31,950.61 = 12,556.08 : x
  2. Step 2: Convert to fraction form
    21,325.95/31,950.61 = 12,556.08/x
  3. Step 3: Cross multiply
    21,325.95x = 31,950.61 × 12,556.08
  4. Step 4: Simplify right side
    21,325.95x = 401,174,415.21
  5. Step 5: Solve for x
    x = 401,174,415.21/21,325.95
  6. Step 6: Final answer
    x = 18,811.56

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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.