Home / 21,249.18-31,877.64-8,762.40

Finding the Fourth Proportional to 21,249.18, 31,877.64 and 8,762.40

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Solution

The fourth proportional to 21,249.18, 31,877.64 and 8,762.40 is: 13,145.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,249.18 : 31,877.64 = 8,762.40 : x
  2. Step 2: Convert to fraction form
    21,249.18/31,877.64 = 8,762.40/x
  3. Step 3: Cross multiply
    21,249.18x = 31,877.64 × 8,762.40
  4. Step 4: Simplify right side
    21,249.18x = 279,324,632.74
  5. Step 5: Solve for x
    x = 279,324,632.74/21,249.18
  6. Step 6: Final answer
    x = 13,145.20

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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.