Home / 31,412.79-47,135.13-20,890.13

Finding the Fourth Proportional to 31,412.79, 47,135.13 and 20,890.13

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Solution

The fourth proportional to 31,412.79, 47,135.13 and 20,890.13 is: 31,345.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,412.79 : 47,135.13 = 20,890.13 : x
  2. Step 2: Convert to fraction form
    31,412.79/47,135.13 = 20,890.13/x
  3. Step 3: Cross multiply
    31,412.79x = 47,135.13 × 20,890.13
  4. Step 4: Simplify right side
    31,412.79x = 984,658,993.27
  5. Step 5: Solve for x
    x = 984,658,993.27/31,412.79
  6. Step 6: Final answer
    x = 31,345.80

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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.