Home / 31,421.09-47,129.20-18,265.07

Finding the Fourth Proportional to 31,421.09, 47,129.20 and 18,265.07

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Solution

The fourth proportional to 31,421.09, 47,129.20 and 18,265.07 is: 27,396.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,421.09 : 47,129.20 = 18,265.07 : x
  2. Step 2: Convert to fraction form
    31,421.09/47,129.20 = 18,265.07/x
  3. Step 3: Cross multiply
    31,421.09x = 47,129.20 × 18,265.07
  4. Step 4: Simplify right side
    31,421.09x = 860,818,137.04
  5. Step 5: Solve for x
    x = 860,818,137.04/31,421.09
  6. Step 6: Final answer
    x = 27,396.19

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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.