Home / 31,851.21-47,777.24-12,130.86

Finding the Fourth Proportional to 31,851.21, 47,777.24 and 12,130.86

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Solution

The fourth proportional to 31,851.21, 47,777.24 and 12,130.86 is: 18,196.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,851.21 : 47,777.24 = 12,130.86 : x
  2. Step 2: Convert to fraction form
    31,851.21/47,777.24 = 12,130.86/x
  3. Step 3: Cross multiply
    31,851.21x = 47,777.24 × 12,130.86
  4. Step 4: Simplify right side
    31,851.21x = 579,579,009.63
  5. Step 5: Solve for x
    x = 579,579,009.63/31,851.21
  6. Step 6: Final answer
    x = 18,196.45

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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.