Home / 31,403.86-47,079.31-13,621.13

Finding the Fourth Proportional to 31,403.86, 47,079.31 and 13,621.13

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Solution

The fourth proportional to 31,403.86, 47,079.31 and 13,621.13 is: 20,420.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,403.86 : 47,079.31 = 13,621.13 : x
  2. Step 2: Convert to fraction form
    31,403.86/47,079.31 = 13,621.13/x
  3. Step 3: Cross multiply
    31,403.86x = 47,079.31 × 13,621.13
  4. Step 4: Simplify right side
    31,403.86x = 641,273,401.82
  5. Step 5: Solve for x
    x = 641,273,401.82/31,403.86
  6. Step 6: Final answer
    x = 20,420.21

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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.